The respiratory system

What are the six functions of the respiratory system?

1. Absorb oxygen

2. Remove CO ²

3. Make sound

4. Add moisture

5. Warm air

6. Air

#1 absorb oxygen

• brings in and absorbs oxygen

• Oxygen is used to obtain energy from food

#2 remove CO²

carbon dioxide is a waste product that is removed from the body

#3 make sound

• air passes through the vocal cords and causes them to vibrate, creating sound

#4 add moisture

• air that enters the body is dry and needs moisture added before it reaches the lungs

#5 warm air

•Air that enters the body is often cold and needs to be warmed before it reaches the lungs

#6 air

• air that enters the body often contains debris that needs to be removed before it reaches the lungs

air travels through:

1. Nasal and oral cavity

2. Pharynx

3. Larynx

4. Trachea

5. Left and right bronchi

6. Lungs

• the ___ are two organs where gas exchange occurs

Lungs

• ___ air tubes lead to ___ air tubes which lead to alveoli

Large, smaller

• ______ are tiny sacs surrounded by capillaries

Alveoli

What is the process of the respiratory system?

1. Air enters the lungs and alveoli (tiny sacs in the lungs)

2. Oxygen enters the blood and CO^2 exits the blood

3. Blood brings oxygen to body cells and removes CO^2

4. Blood returns to the lungs and the cycle continues