RESPIRATORY SYSTEM Human physiology. Your cells need food (digestive system) and oxygen Respiration is the process that gets oxygen to the cells and.

RESPIRATORY SYSTEM

Human physiology

Your cells need food (digestive system) and

oxygen

Respiration is the process that gets oxygen to the

cells and removes waste gases.

BREATHING FOR LIFE

THE RESPIRATORY SYSTEM

1st step: breathing air into your mouth and/or

nose• Nasal - nose cavity• Oral – mouth cavity• Diaphragm – sheet of muscle under lungs

2nd step: air passes structure called larynx• Larynx – voice box contains vocal cords• Vocal cords vibrate to produce sounds for speech

THE RESPIRATORY SYSTEM

3rd step: trachea• Trachea a long tube leading to your lungs• Trachea is also called your windpipe• Epiglottis – flap of skin that closes over trachea when you

swallow (so food doesn’t get into lungs!

4th step: bronchi &bronchioles• Bronchi are 2 small tubes which enter the lungs• Become smaller tubes within the lungs called bronchioles

5th step: lungs• Your lungs are like sponges• Many small air sacs that fill up when you breath in• Oxygen passes from air sacs into your blood

THE RESPIRATORY SYSTEM

Your blood carries the oxygen to all of your cells

Oxygen combines with food to make energy that

you need

Waste products (carbon dioxide and water vapor)

are produced

Waste products are carried back to you lungs and

you breath them out!

mouth

Bronchioles

Air sacs

EXIT SLIP

1. What path does air take after

entering the body?

2. How does oxygen pass from your

lungs into your blood?

3. What are the waste products that

we breathe out?

Through the walls of the air sacs

Air goes down the throat to the larynx, trachea, bronchi and then lungs

Carbon dioxide and water vapor