TEAS lymphatic system SE

🛡 The lymphatic system =

part of your body's defense system.

Think of it as a security/cleanup network throughout your body.

🛡 Lymphatic System — SUPER EASY

The lymphatic system has lymph vessels + lymph nodes + organs that help your body fight germs and manage fluid .

For this section, focus on the organs shown in your picture.

🫘 1. Lymph nodes =

FILTER STATIONS

The little green dots in the picture are lymph nodes .

They are like:

🚧 Security checkpoints

They help filter lymph and help immune cells detect and fight harmful substances.

You have groups of them in places like:

• Cervical → neck

• Axillary → armpit

• Inguinal → groin

• Popliteal → behind knee

🧠 Easy trick:

CAIP

Think:

“Can't Avoid Important Problems” 😂

Or just remember the locations:

Neck → Armpit → Groin → Knee

🩸 2. Spleen =

BLOOD FILTER + DEFENSE

The spleen is in the upper-left side of your abdomen (your body's left side).

Think:

🩸 SPLEEN = blood security

It helps filter blood and supports immune defense, including fighting certain bacteria.

🧠 Trick:

Spleen = Security

👄 3. Tonsils + Adenoids =

ENTRANCE GUARDS

They're around your nose/throat area.

They help detect things that enter through your:

👃 Nose
👄 Mouth

Think:

Tonsils = guards at the entrance. 🚪🛡

---

🦠 4. Appendix = IMMUNE HELPER

The appendix isn't just useless.

It has immune-related functions and contains lymphatic tissue.

It's located near the beginning of the large intestine .

🧠 Think:

Appendix = little immune helper attached to the intestine.

❤ 5. Thymus =

T-CELL SCHOOL 🎓

This one is VERY important to understand.

The thymus sits above the heart.

Its big job is helping T cells mature .

Think:

🏫 THYMUS = T-cell training school

T cells enter → mature/train → become ready to help the immune system.

🧠 BEST TRICK:

THYMUS → T cells

They both start with T. 😎

The thymus is especially active during childhood and puberty . After puberty, it becomes smaller and less active.

🧠 THE WHOLE PICTURE

Think of your lymphatic system as a security team :

🚪 Tonsils + adenoids

Guard entrances

🚧 Lymph nodes

Check/filter lymph

🩸 Spleen

Checks blood + helps fight germs

🦠 Appendix

Immune tissue in the digestive area

🏫 Thymus

Trains/matures T cells

---

🎯 Teas Must-Know

If you see:

“T-cell maturation”
👉 🏫 THYMUS

“Above the heart”
👉 🏫 THYMUS

“Filters lymph / immune checkpoint”
👉 🚧 LYMPH NODES

“Helps fight certain bacteria / blood-related immune function”
👉 🩸 SPLEEN

“Guards things entering through mouth/nose”
👉 👄 TONSILS + ADENOIDS

“Immune tissue near intestine”
👉 APPENDIX

⭐ Fastest memory line:

“Tonsils guard, nodes check, spleen filters, appendix helps, thymus trains T cells.”

🧠 Lymph Nodes =

Security Checkpoints 🚧

Super easy:

Lymph fluid travels through the body → passes through lymph nodes → lymph nodes filter it and help immune cells find and destroy germs/pathogens and harmful substances.

Think of it like this:

🦠 Germs enter lymph
⬇
🚧 Lymph node = security checkpoint
⬇
🛡 Immune cells attack harmful stuff

🔥 TEAS memory trick:

LYMPH NODES = FILTER LYMPH

And:

“Nodes = No bad stuff gets through!” 🚧🛡

🎯 If the TEAS asks:

“What filters lymph fluid?”
👉 Lymph nodes

“What do lymph nodes help destroy?”
👉 Pathogens and foreign substances

🦠 When a pathogen enters...

harmful germ/foreign invader

Your immune system basically says:

🚨 "INTRUDER! GET THE TEAM!"

Then different immune cells have different jobs.

🛡 The 4 BIG immune cells

1⃣ Macrophages = EATERS 🍽

Macrophages eat and destroy pathogens and infected cells .

This process is called:

Phagocytosis = “cell eating”

🧠 Trick:

MACROPHAGE = MUNCHES 🍽

Phagocytosis → eats the bad stuff

2⃣ Helper T cells = GENERALS 👨‍✈

Helper T cells coordinate the attack .

They activate:

➡ Killer T cells
➡ B cells

🧠 Trick:

HELPER T = “HELP EVERYONE!”

They don't do all the attacking themselves—they tell other immune cells what to do.

3⃣ Killer T cells = KILL INFECTED CELLS ⚔

These attack and destroy infected body cells .

🧠 Easy:

Killer T = KILLS infected cells

Very straightforward. 😂

4⃣ B cells = LABEL THE INVADER 🏷

B cells help mark/tag invaders so they can be destroyed later.

Think:

B cells = “BAD GUY TAGGED!” 🏷

Your notes are emphasizing that B cells label invaders for macrophages .

🧠 THE WHOLE TEAM

Cell	Job	Memory
🦠 Macrophage	Eats pathogens/infected cells	MUNCH 🍽
👨‍✈ Helper T	Activates other immune cells	HELP 📢
⚔ Killer T	Kills infected cells	KILL
🏷 B cell	Labels invaders	BAD GUY TAG

MACROPHAGE = MUNCH
HELPER T = HELP
KILLER T = KILL
B CELL = BAD GUY TAG

🤧 What happens with the flu?

1. Flu virus enters 😷

You breathe in tiny droplets containing influenza virus.

⬇

2. Mucus tries to trap it 🫧

Your respiratory system has mucous membranes that can catch germs.

⬇

3. If the virus gets past them...

The virus can infect cells.

⬇

4. Macrophages notice 🚨

Macrophages send an alarm signal .

⬇

5. Helper T cells respond 👨‍✈

Helper T cells activate:

Killer T cells + B cells

⬇

6. The immune team attacks 🛡

Killer T → infected cells

B cells → label invaders

Macrophages → eat pathogens/infected cells

🎯 Teas Must-Know

If the question says...

“Which cell eats pathogens?”

👉 Macrophage

“What is the process of eating pathogens?”
👉 Phagocytosis

“Which cell activates B cells and killer T cells?”
👉 Helper T cell

“Which cell kills infected cells?”
👉 Killer T cell

“Which cell labels invaders?”
👉 B cell

⭐ One sentence to memorize:

“Macrophages munch, Helper T's help, Killer T's kill, and B cells tag.” 🧠🔥

🦠 What happens after the helper T cell is activated?

Helper T = BOSS → Killer T = KILLS → B cell = TAGS

1⃣ Helper T cells call for backup 📢

Helper T cells send chemical signals that activate:

➡ Killer T cells
➡ B cells

Think:

Helper T = the GENERAL 👨‍✈

It tells the other immune cells what to do.

⚔ 2. Killer T cells attack infected cells

The killer T cell looks for body cells that have been infected by the virus.

Step-by-step:

Killer T recognizes infected cell
⬇
Releases enzymes
⬇
The infected cell is triggered to destroy itself
⬇
This is called APOPTOSIS

🧠 TEAS trick:

APOPTOSIS = programmed cell death

Think:

“Apoptosis = the cell gets an ORDERLY OFF switch.” 🔴

It's the body's controlled way of getting rid of a damaged/infected cell.

🏷 3. B cells = ANTIBODY MAKERS

B cells are another part of the immune team.

They have antibody receptors that recognize specific foreign substances.

When activated, B cells can produce antibodies that:

Attach to pathogens and TAG them for destruction. 🏷

Think of antibodies like little name tags:

🦠 Pathogen
⬇
🏷 ANTIBODY attaches
⬇
🛡 Immune system knows: "GET THIS ONE!"

🧠 Memory trick:

B cells = “BAD GUY TAGGERS” 🏷

🧹 4. Macrophages clean up

Remember our previous lesson?

Macrophages = MUNCHERS 🍽

They consume:

• pathogens

• infected cells

• other marked foreign material

This eating process is:

Phagocytosis = cell eating

So the immune team works together.

🧠 PUT THE WHOLE STORY TOGETHER

Imagine a flu virus gets into your body:

🦠 Virus enters

⬇

🍽 Macrophage notices it

⬇

📢 Helper T = "CALL THE TEAM!"

⬇

⚔ Killer T attacks infected cells

⬇

🏷 B cells make antibodies that tag pathogens

⬇

🍽 Macrophages clean up

🔥 THE 4 IMMUNE CELLS TO MEMORIZE

Cell	Main job	Memory
Macrophage	Eats pathogens/infected cells	🍽 MUNCH
Helper T	Activates other immune cells	📢 HELP
Killer T	Destroys infected cells	⚔ KILL
B cell	Makes antibodies that tag pathogens	🏷 TAG

⭐ BEST MEMORY SENTENCE:

“Helper T HELPS, Killer T KILLS, B TAGS, Macrophages MUNCH.”

That's honestly the whole immune response in one sentence. 🧠🔥

🚨 One TEAS detail to remember

Antibody = protein that specifically binds to an antigen/pathogen.

So:

Antibody = TAG 🏷
Killer T = KILLS infected cells ⚔
Macrophage = EATS 🧹

Which of the following is the correct series of the lymphatic system’s defense mechanisms?

• answer/ why?

Macrophage Helper T cell B cell and T cell

The trick is that “comes first” does NOT mean “does the final job first.”

The macrophage can be involved at the beginning AND later .

🦠Think of it like an alarm system:

1. Macrophage sees the pathogen 🚨
It recognizes the invader and sounds the alarm .

⬇

2. Helper T cell responds 📢
The Helper T cell gets activated.

⬇

3. Helper T activates B cells + Killer T cells ⚔🏷

⬇

4. The immune cells attack

• Killer T → destroys infected cells

• B cells → make antibodies that tag pathogens

⬇

5. Macrophages clean up 🍽
Macrophages consume pathogens and infected cells.

---

🧠 So why is macrophage FIRST in the answer?

Because the question is asking about the series of events , and the macrophage starts the alarm .

It doesn't mean:

"Macrophage eats everything → then Helper T → then B/T."

Instead:

Macrophage sounds alarm → Helper T activates team → B/Killer T fight → Macrophage helps clean up.

🔥 BEST MEMORY

Think of the macrophage as a security guard :

🚨 SEES intruder → SOUNDS ALARM → calls the team → later CLEANS UP

So remember:

MACROPHAGE = ALARM FIRST, MUNCH LATER 🍽🚨

That's why the answer starts with Macrophage even though macrophages also do cleanup at the end.

Killer T cells and macrophages both destroy things, but they target DIFFERENT things.

🦠 Think of it like this:⚔ Killer T cells = kill INFECTED BODY CELLS

A virus like the flu gets inside one of your cells .

So the Killer T cell says:

"This is one of our cells, but it's infected. Get rid of it."

➡ Killer T cell destroys the infected body cell .

🍽 Macrophages = eat PATHOGENS + INFECTED CELLS

Macrophages can consume:

• 🦠 Pathogens (like viruses, bacteria, etc.)

• 💀 Infected/damaged cells

• 🧹 Cell debris/leftover material

So macrophages are partly like the cleanup crew .

---

🧠 Super simple example

Imagine a house gets infected by a virus:

🏠 Your body cell = house
🦠 Virus = intruder

Killer T:

⚔ Destroys the infected house

Macrophage:

🍽 Cleans up the destroyed/damaged material and can consume pathogens

So they're working together , not doing the exact same job.

🚨 The whole sequence

cells

Macrophage notices pathogen
⬇
🚨 Sounds alarm
⬇
Helper T gets activated
⬇
📢 Helper T activates Killer T + B cells
⬇
⚔ Killer T destroys infected body cells
⬇
🏷 B cells make antibodies that tag pathogens
⬇
🍽 Macrophages consume pathogens + infected cells/debris

🔥 Memorize this:

Killer T = KILLS infected CELLS ⚔
Macrophage = MUNCHES pathogens + cleans up 🍽
Helper T = HELPS/coordinates 📢
B cell = BUILDS antibodies 🏷

The key difference:
👉 Killer T attacks the infected BODY CELL.
👉 Macrophage eats pathogens and helps clean up the aftermath.

The B cells do not directly attack pathogens or infected cells. Instead, they

• mark the pathogens for destruction by macrophages and natural killer cells.

  Correct answer.

  The B cells do not directly attack pathogens or infected cells. Instead, they mark the pathogens for destruction by macrophages and natural killer cells.

🌿 NATURAL vs 💉 ARTIFICIAL

and

📩 PASSIVE vs 🛡 ACTIVE

🧠 First: What do these words mean?

🌿 NATURAL = happens naturally

No medical treatment is needed.

💉 ARTIFICIAL = comes from medical treatment

Think vaccine or injected serum .

---

📩 PASSIVE = you RECEIVE antibodies

Someone/something else already made the antibodies, and you receive them .

PASSIVE = “I get protection.”

🛡 ACTIVE = YOUR body makes antibodies

Your immune system does the work and makes its own antibodies.

ACTIVE = “I make protection.”

🔥This is the most important trick!

1⃣ Natural + Passive 🌿📩

Baby receives antibodies from breast milk.

The baby doesn't make the antibodies .

➡ Gets them naturally
➡ From another source

= Natural Passive

🧠 Baby = receives

2⃣ Natural + Active 🌿🛡

You get sick naturally .

Your immune system responds and makes antibodies .

➡ Natural infection
➡ YOUR body makes antibodies

= Natural Active

🧠 Sick → Make

3⃣ Artificial + Passive 💉📩

You receive antibodies from a medical source , such as an antibody-containing serum.

➡ Medical treatment
➡ You receive antibodies
➡ Usually temporary

= Artificial Passive

🧠 Shot/serum → Receive

4⃣ Artificial + Active 💉🛡

ou get a vaccine .

The vaccine trains your immune system so YOUR body makes its own immune response/antibodies .

➡ Medical treatment
➡ YOUR body responds

= Artificial Active

🧠 Vaccine → Make

🔥 THE BEST TEAS TRICK

Question 1:

Did it happen naturally or through medicine?

🌿 Natural
💉 Artificial

Question 2:

Did MY body make the antibodies or did I RECEIVE them?

🛡 Active = MY BODY MAKES
📩 Passive = I RECEIVE

Type	What happens?	Example
🌿 Natural Passive	Receive antibodies naturally	Breast milk
🌿 Natural Active	Body makes antibodies after illness	Getting sick
💉 Artificial Passive	Receive antibodies medically	Serum
💉 Artificial Active	Body makes immune response after medical treatment	Vaccine

🧠 MEMORIZE THIS:

ACTIVE = I MAKE 💪
PASSIVE = I RECEIVE 📩
NATURAL = NO MEDICAL TREATMENT 🌿
ARTIFICIAL = MEDICAL TREATMENT 💉

⭐ Super-fast examples:

Breast milk → 🌿 + 📩 = Natural Passive

Get sick → 🌿 + 💪 = Natural Active

Serum → 💉 + 📩 = Artificial Passive

Vaccine → 💉 + 💪 = Artificial Active

💉 Vaccination =

Practice for Your Immune System

A vaccine teaches your immune system to recognize a pathogen BEFORE you get sick from it.

Think of it like a practice drill for your body's security team. 🛡

🦠 How does vaccination work?

1. Vaccine enters the body

It presents a harmless form or piece of a pathogen, or instructions for making a harmless pathogen protein.

2. Immune system practices

Your immune cells learn to recognize the pathogen and make a specific immune response.

3. Memory cells form

These cells remember the pathogen so your body can respond faster if it encounters it again.

4. You gain protection

Your immune system is better prepared to fight that disease in the future.

🧠 The 3 words to memorize

• Vaccine = teaches

• Memory cells = remember

• Immunity = protection

🔥 Cool memory trick

VACCINE = PRACTICE → MEMORY → PROTECTION

Imagine your immune system studying for a test before the real exam. 📚

The vaccine is the practice, memory cells remember the answers, and the real pathogen is the test!

: Which type of immunity?

Vaccination gives you artificial active immunity.

• Artificial = medical intervention

• Active = your own immune system makes the response and develops memory

Remember: Active = YOUR body does the work.

⭐ TEAS quick review

If the question asks…	Remember…
What prepares the immune system?	Vaccination
What remembers a pathogen?	Memory cells
What type of immunity comes from a vaccine?	Artificial active
Does vaccination require getting the actual disease first?	No
What diseases have vaccines helped prevent?	Polio, tetanus, diphtheria

One last important fact: vaccines have helped eliminate smallpox worldwide.

Your one-sentence answer for the TEAS: A vaccine trains the immune system to recognize a pathogen and develop memory cells, helping protect the body from future infection.

🧠 First: What is an autoimmune disease?

the immune system accidentally attacks the body’s own cells. 🛡➡😬

Normally:

🛡 Immune system = protects YOU from foreign invaders

But in an autoimmune disease:

🛡 Immune system gets confused → attacks YOUR OWN cells/tissues

🔥 TEAS memory trick:

AUTO = SELF

So:

Autoimmune = immune system attacks SELF.

🎯 The 4 diseases you need to recognize

1-2

1⃣ Lupus → MANY areas

Systemic lupus erythematosus (SLE) can affect:

• Connective tissue

• Joints

• Kidneys

• Skin

🧠 LUPUS = LOTS OF AREAS

Think:

Lupus = “all over” 🌎

2⃣ Type 1 Diabetes → PANCREAS 🍬

The immune system attacks the insulin-producing cells in the pancreas.

➡ Less insulin
➡ Blood glucose becomes too high

🧠 TYPE 1 = pancreas gets attacked

Memory trick:

“Type 1 = insulin cells are attacked.”

---

🎯 The 4 diseases you need to recognize

3-4

3⃣ Graves' Disease → THYROID 🦋

The immune system attacks/affects the thyroid, causing it to become overactive.

➡ Metabolism speeds up 🔥

Common clues:

• Weight loss

• Sweating

• Heat intolerance

• Irritability

• Trouble sleeping

🧠 Memory:

GRAVES = thyroid runs TOO FAST 🏃‍♀🔥

4⃣ Rheumatoid Arthritis → JOINTS 🦴

The immune system attacks tissues around the joints.

➡ Inflammation
➡ Pain/swelling/stiffness

🧠 Easy:

RHEUMATOID = JOINTS

🚨 TEAS QUICK MATCH

Disease	Think
Lupus	🌎 Many areas
Type 1 Diabetes	🍬 Pancreas/insulin cells
Graves'	🦋 Thyroid
Rheumatoid arthritis	🦴 Joints

🔥 Memory sentence:

“Lupus = LOTS, Type 1 = SUGAR, Graves = THYROID, Rheumatoid = JOINTS.”

🧓 What happens with aging?

As people get older:

B cells ↓
T cells ↓

⬇

The immune system becomes less effective at defending against infections.

So:

Aging → fewer B & T cells → weaker immune defense

🧠 Super easy:

“Older = fewer defenders.” 👴🛡

---

🎯 THE TEAS 15-SECOND REVIEW

autoimmune and more

Autoimmune:

Immune system attacks SELF.

Lupus:

Many body areas

Type 1 diabetes:

Insulin-producing pancreatic cells

Graves':

Thyroid → overactive

Rheumatoid arthritis:

Joints

Aging:

B cells ↓ + T cells ↓ → immune defense ↓

If you see AUTO on the TEAS, immediately think:

🚨 AUTO = SELF ATTACK.

🌼 Allergy =

immune system overreacting

Your immune system is supposed to protect you from harmful things. With an allergy, it reacts strongly to something that normally isn't dangerous, like pollen.

Think:

Allergy = immune system says “DANGER!” when it doesn’t really need to.

🧠 What happens? — SUPER SIMPLE

1. Antigen enters 🌿
Something like pollen enters your body.

⬇

2. Mast cells react
Mast cells are immune cells found around places where things enter the body.

⬇

3. Histamine is released 💥
The mast cell releases histamine.

⬇

4. Histamine causes inflammation
This is where you get allergy symptoms.

🚨 What does histamine DO?

Think:

HISTAMINE = “MAKE THINGS SWELL + GET MUCUS”

It causes:

• 🩸 Blood vessels to dilate → blood vessels get wider

• 💧 More fluid can leave the vessels → swelling

• 🤧 More mucus → runny/stuffy nose

• 😣 Itching → itchy skin/nose/eyes

• 🫁 Airways can contract → harder to breathe in some allergic reactions

That's basically what the picture is showing.

⭐ The TEAS sequence to memorize

ALLERGEN → MAST CELL → HISTAMINE → ALLERGY SYMPTOMS

Or:

“Mast cells make histamine, and histamine makes you miserable.” 😭

🔑 Most important TEAS facts

allergies

Term	Super easy meaning
Antigen/allergen	Thing that triggers the immune response
Mast cell	Immune cell that releases histamine
Histamine	Chemical that causes allergy/inflammation symptoms
Inflammation	Body's response causing swelling, redness, etc.
Vasodilation	Blood vessels get wider
Mucus increases	Runny/stuffy nose

🧠 One-line memory trick

“Allergy → Mast cell → Histamine → SWELL + MUCUS + ITCH.”

If you remember Mast cell → Histamine, you've got the main TEAS point.

First: HIV vs. AIDS

Think:

HIV = the virus
AIDS = the weakened immune-system condition HIV can cause

HIV attacks important immune cells, especially helper T cells. When helper T cells are damaged, the immune system has a harder time coordinating its defense.

🧠 The biggest TEAS idea

HIV → Helper T cells ↓ → Immune defense ↓

Remember:

“HIV Hurts Helper T cells.” ⭐

🛡 Why are helper T cells so important?

Helper T cells = the immune system's “generals.”

They help activate:

• B cells → make antibodies

• Killer T cells → destroy infected cells

So if HIV destroys helper T cells:

Helper T cells ↓ → B & killer T-cell responses become weaker → infections become harder to fight

That's why advanced HIV/AIDS can lead to serious infections.

🩸 How is HIV transmitted?

HIV can be transmitted through certain infected body fluids.

Examples include:

• Blood

• Semen

• Vaginal fluids

• Breast milk

Transmission can occur through things such as:

• sharing contaminated needles

• sexual contact

• pregnancy, birth, or breastfeeding from a person with HIV to their baby

❌ NOT spread by casual contact

HIV is not spread by:

• 🤝 shaking hands

• 🍽 sharing food

• 🚽 toilet seats

• 💧 drinking fountains

• 🫂 ordinary casual contact

• 🌬 air

🚨 Important correction to your notes

Your notes say HIV can only survive in blood/body fluids because macrophages are located there. That's not the right explanation.

You don't need to memorize the macrophage part.

Instead, memorize:

HIV transmission = certain infected body fluids, NOT casual contact

⭐ FAST TEAS CHEAT SHEET

HIV

Remember	Meaning
HIV	Virus
AIDS	Advanced HIV-related immune-system damage
Main immune target to know	Helper T cells
Helper T cells	Coordinate/activate other immune cells
Transmission	Certain infected body fluids
Not transmitted by	Casual contact, air, food, toilet seats

🧠 THE 3 THINGS TO MEMORIZE

1. HIV → Helper T cells ↓

2. Helper T cells = immune-system generals

3. HIV spreads through certain infected body fluids, NOT casual contact

🔥 One catchy sentence:

“HIV hurts the Helpers, weakening the immune defense.”

HIV →

attacks helper T cells → immune system becomes weaker → harder to fight infections

🧠 TEAS memory trick:

HIV = Helper T cells ↓ = Immune defense ↓

🛡 Lymphatic System

immune defense

👉 It helps protect your body from pathogens (harmful germs).

🧠 Memory:

LYMPH = LOCKS DOWN germs 🔒

2. Many organs work together

The lymphatic system includes things like:

• Lymph nodes → filter lymph

• Spleen → filters blood + immune defense

• Thymus → helps T cells mature

• Tonsils → guard entrances

• Lymphatic vessels → move lymph

🧠 Think:

"It's a whole security system, not just one organ."

⚔ 3. Killer T cells and B cells

destroy infected body cells

For example:

🦠 Virus infects your cell
⬇
⚔ Killer T cell recognizes the infected cell
⬇
💥 Destroys the infected cell

🧠 TRICK:

KILLER T = KILLS infected cells

🏷 4. B cells

This is where your notes can be confusing.

B cells make antibodies.

Antibodies attach to specific pathogens and help mark them for destruction.

Think:

B cell = BAD GUY TAGGER 🏷

So:

B cell → antibodies → tag pathogen

⚠ For the TEAS, remember that B cells don't directly destroy pathogens like killer T cells do.

💉 5. Vaccination

A vaccine gives your immune system a safe preview of a pathogen.

Your immune system sees it and learns:

"Remember this guy!"

Then it creates immune memory so it can respond faster later.

🧠 Best trick:

Vaccine = PRACTICE → MEMORY → PROTECTION

And for immunity questions:

Vaccine = Artificial Active Immunity ⭐

---

🚨 6. Autoimmune disease

Normally:

Immune system → attacks foreign things

Autoimmune disease:

Immune system → accidentally attacks YOU

🧠 AUTO = SELF

AUTOimmune = immune system attacks SELF

Examples:

• Type 1 diabetes → attacks insulin-producing pancreatic cells

• Rheumatoid arthritis → attacks joints

• Lupus → can affect multiple tissues

👵 7. Aging

As we get older, the immune system becomes less effective.

One important reason:

B cells ↓ + T cells ↓ → immune defense ↓

🧠 Memory:

OLDER = FEWER DEFENDERS 🛡

⭐ TEAS 30-SECOND REVIEW

Memorize this:

LYMPHATIC = DEFENSE 🛡

KILLER T = KILLS infected cells ⚔

B CELL = MAKES ANTIBODIES 🏷

VACCINE = PRACTICE + MEMORY 💉

AUTO = SELF ATTACK 🚨

AGING = FEWER DEFENDERS 👵

🔥 One sentence to remember everything:

“The lymphatic system defends, Killer T cells kill, B cells tag, vaccines teach, autoimmune attacks self, and aging weakens defense.”