Organ Systems

The 11 organ systems in the body

integumentary system

-largest organ system in the body

-contains:

1. skin,

2. nails,

3. hair

-function:

1. encloses internal body structures

2. site of many sensory receptors

skeletal system

bones

-contains:

1. bones,

2. joints,

3. cartilage

-function:

1. give support;

2. enables movement (with muscular system);

3. storage (calcium - store calcium in bones and calcium gives you muscle contraction)

muscular system

muscles

-contains:

1. skeletal muscles,

2. tendons

-function:

1. provides movement (with skeletal system);

2. helps maintain body temperature

-also have things like cardiac muscle, smooth muscle, etc - these work in different ways but all produce motion

nervous system

-contains:

1. brain,

2. spinal cord,

3. nerves

-function:

1. detects and processes sensory information;

2. activates bodily responses - tells other organ what to do - is a regulatory system

-has interactions with all other organ systems

endocrine system

-hormones

-also related to regulation

-contains:

1. pituitary gland

2. thyroid gland

3. pancreas

4. adrenal glands

5. gonads (testes/ovaries)

6. pineal gland

7. thymus

-function:

1. secretes hormones

2. regulates bodily processes

reproductive system (male and female)

female reproductive system:

-contains:

1. mammary glands

2. ovaries

3. uterus

-function:

1. produces sex hormones and gametes

2. supports embryo/fetus until birth

3. produces milk for infant

male reproductive system:

-contains:

1. epididymis

2. testes

-function:

1. produces sex hormones and gametes

2. delivers gametes to female

circulatory/cardiovascular system

-contains:

1. heart

2. blood vessels

3. (blood itself)

-function:

1. delivers oxygen and nutrients to tissues

   1. equalizes temperature in the body

respiratory system

-contains:

1. lungs

2. trachea

3. nasal passage

4. (pharynx)

5. (larynx)

-function: gets rid of CO2 from body and brings in O2 into the body

1. removes CO2 from the body

2. delivers O2 to blood

digestive system

-contains:

1. stomach

2. liver

3. gall bladder

4. large intestine

5. small intestine

6. (esophagus) ?

7. (mouth) ?

-function: obtains energy inside the body; processes food and obtains energy from food and how we get ride of some waste products

1. processes food for use by the body

   1. removes waste from undigested food

urinary system

-contains:

1. kidneys

2. urinary bladder

-function:

1. controls water balance in the body

2. removes wastes from blood and excretes them

   1. regulates pH and contents and quality of fluids in our body

lymphatic system

immune system (technically a circulatory system)

-contains:

1. thymus

2. lymph nodes

3. spleen

4. lymphatic vessels

-function:

1. returns fluid to blood

2. defends against pathogens - deals with how we defend ourselves from aggression from outside and how we defend ourselves from infection