Sponge #1

Imagine that you have just been running or exercising strenuously. Please give examples of what happens to your body.

How do you feel?Heart?Lungs?Chest?

KEY CONCEPT

The respiratory and circulatory systems bring oxygen and nutrients to the cells.

30.1 Respiratory Functions

nose

sinus

mouth

epiglottis

trachea

lungs

• The respiratory system is where gas exchange occurs.

– What are the gases involved with the respiratory system?

nose

sinus

mouth

epiglottis

trachea

lungs

• The respiratory system is where gas exchange occurs.

– picks up oxygen from inhaled air – expels carbon dioxide and water

• What are the waste products of the respiratory system?

• CO2 and water vapor

Draw and label the

parts of the respiratory

system

The respiratory system moves gases into and out of the blood.

• Only place where gases in the blood are exchanged with gases from the atmosphere

• What happens when areas of the body do not get oxygen?

• What happens when a tourniquet is put on?

The lungs contain the • Bronchi: passage of airway into lungs• Bronchioles: passage to the air sacs of the lungs• Alveoli: absorb oxygen- gas exchange with blood

alveoli bronchiole

bronchiole

Bronchi

Or Bronchus

alveoli

bronchiole

alveoli

Bronchi or Bronchus

Draw and label the parts of the lungs

• Breathing involves the diaphragm and muscles of the rib cage.

• Air flows from areas of high pressure to low pressure.

Air inhaled.

Muscles contract andrib cage expands.

Diaphragm flattensand moves downward.

Air exhaled.

Muscles andrib cage relax.

Diaphragm relaxesand rises.