Respiratory System

Respiratory System

Air sac• air-filled spaces in the body

alveoli• very small air sacs; where

air breathed in goes

Respiratory System

Bronchial tubes• two tubes at the end of the

trachea, brings in air from trachea and helps clean lungs; one tube goes to right lung, one to left

diaphragm• sheet-like muscle separating

the chest from the abdominal cavity; creates suction to draw in air and expand lungs

Respiratory System

exhale• to breathe out

inhale• to breathe in

Respiratory System

larynx• voice box

lungs• two respiratory organs

Respiratory System

Nasal cavity• helps with inhaling and

exhaling of air through the nose

pharynx• throat; collects incoming air

from the nose and passes air to the trachea

Respiratory System

respiration• inhaling and exhaling air,

breathing

ribs• bones that protect and

support the chest

Respiratory System

sinuses• hollow spaces in the bones

of the head, helps regulate temperature of air breathed in

windpipe• windpipe; passage from

pharynx to lungs

About this system…

• Uses lungs to breath in (inhale) and out (exhale)

Inhaling

1. Air enters through the nasal passage2. Air travels through the throat to the trachea3. The trachea divides into two tubes called the

bronchial tubes4. The bronchial tubes lead to the lungs5. In the lungs, the bronchial tubes divide into

smaller tubes called the bronchioles6. At the ends of the bronchioles, there are air sacs7. The diaphragm is at the bottom of the chest cavity.

Exhaling

• Carbon Dioxide is a waste product• Cells need to get rid of carbon dioxide• When blood cells absorb oxygen, it lets go of

carbon dioxide.

Watch This!!

Check out this site!!

• http://www.e-learningforkids.org/Courses/Liquid_Animation/Body_Parts/Respiratory_System/index.html