1. Section 30-1 “Respiratory & Circulatory Systems”
Write everything that is underlined

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

3. The circulatory system transports blood and other materials
I. The respiratory and circulatory systems work together to maintain homeostasis
The circulatory system transports blood and other materials
brings supplies to cells
carries away wastes
separates oxygen-poor and oxygen-rich blood

4. The respiratory system is where gas exchange occurs
picks up oxygen from inhaled air
expels (gets rid of) carbon dioxide and water
nose
sinus
mouth
epiglottis
trachea
lungs

5. The respiratory system moves gases into and out of the blood
The lungs contain the bronchi, bronchioles, and alveoli
Millions of alveoli give the lungs a huge surface area
The alveoli absorb oxygen from the air you inhale
alveoli
bronchiole

6. Air flows from areas of high pressure to low pressure
Breathing involves the diaphragm and muscles of the rib cage
Air flows from areas of high pressure to low pressure
Air inhaled.
Muscles contract and
rib cage expands.
Diaphragm flattens
and moves downward.
Air exhaled.
Muscles and
rib cage relax.
Diaphragm relaxes
and rises.

7. II. The circulatory system moves blood to all parts of the body
The system includes the heart, arteries, veins, and capillaries
heart pumps blood throughout body
arteries move blood away from heart (Artery Away)
veins move blood back to heart
capillaries get blood to and from the cells
veins
arteries

8. They are working together
The respiratory system exchanges oxygen and carbon dioxide with the blood inside the body and the outside air
The circulatory system moves that blood around the body and back to the lungs
They are working together