Respiratory System 6.1

Does two very important things:

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• brings oxygen into our bodies, which our cells need to function properly

• helps us get rid of carbon dioxide, which is a waste product of cellular respiration

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RESPIRATORY SYSTEM

Carbon dioxide is released from the body when we exhale.

NASAL CAVITY

• warms

• moisturizes

• filters air

trachea

Match the letters with the organ of the Respiratory System?

Letter A Nose

Letter B Trachea

Letter C Lung

Letter D Diaphragm

Here, oxygen passes into the blood and carbon dioxide leaves the blood.

• Breathing is a biophysical process that involves the exchange of gases through inhalation and exhalation

• Respiration is a biochemical process to release energy from organic compounds which are then used for performing different physical activities.

• Respiratory system includes trachea, bronchi, lungs, diaphragm, and the muscles between the ribs.

• Gas exchange is the diffusion of gases into and out of the body

• Oxygen diffuses from the air sacs into the blood. Carbon dioxide diffuses the other way. 

• Thin walls of air sacs help gas exchange to take place quickly.