Aim: How does the Human Respiratory System maintain homeostasis?

HW #18

Read Text pages 956 to 963

Pg.963 section 37-3 ans. ques. 1-5

Pg.968 ques. 19-22

Complete sentences, neatness counts

Respiration can be described…

At the cellular level – oxygen is used to break down glucose in the production of the high energy compound ATP (occurs in the mitochondria of the cell)

Groups: formula for aerobic respiration

At the organ level – structures bring air containing oxygen into the body where it can be transferred to the red blood cells.

Mouth

Nose

Pharynx

Larynx

Trachea

Lung

Bronchus

Bronchioles

Edge ofpleural membrane

Diaphragm

Epiglottis

Capillaries

Alveoli

Bronchiole

Section 37-3

Figure 37-14 The Respiratory System

Trace a molecule of oxygen to the capillary in the alveolus

Alveoli

Bronchiole

Capillary

Section 37-3

Figure 37-15 Gas Exchange in the Lungs

Gas exchange occurs by diffusion across the membrane of an alveolus and a capillary.

Air inhaled

Diaphragm

Rib cage rises

Air exhaled

Diaphragm

Rib cage descends

Inhalation Exhalation

Section 37-3

Figure 37-16 The Mechanics of Breathing

Air inhaled

Diaphragm

Rib cage rises

Air exhaled

Diaphragm

Rib cage descends

Inhalation Exhalation

Section 37-3

Figure 37-16 The Mechanics of Breathing

Smokers lung and healthy lung