1. Aim: Blood Vessels
Aim: Blood Vessels
Enter Date
Warm-up:
HW:

2. Blood vessels arteries arterioles capillaries venules veins veins
artery
arterioles
venules
arterioles
capillaries
venules
veins

3. Arteries: Built for their job
blood flows away from heart
thicker walls
provide strength for high pressure pumping of blood
elastic & stretchable
maintains blood pressure even when heart relaxes

4. Major arteries aorta To Brain & body To Brain & Body pulmonary artery
pulmonary artery = to lungs
coronary arteries

5. Coronary artery bypass
bypass surgery

6. Veins: Built for their job
blood returns back to heart
thinner-walled
blood travels back to heart at low speed & pressure
Blood flows
toward heart
Open valve
Why low pressure?
FAR from heart
Blood flows because muscles contract when we move
Closed valve

8. Major Veins superior vena cava = from upper body
pulmonary vein = from lung
pulmonary vein = from lung
inferior vena cava = from lower body

9. Structure-function relationship
Capillaries
very thin walls
allows diffusion of materials across capillary
O2, CO2, H2O, food, waste
body cell
waste
CO2 O2
food

10. Circulation of Blood 2 part system Circulation to lungs
blood gets O2 from lungs
drops off CO2 to lungs
brings O2-rich blood from lungs to heart
Circulation to body
pumps O2-rich blood to body
picks up nutrients from digestive system
collects CO2 & cell wastes
lungs
heart
body
Circulation to body

11. Vertebrate circulatory system
2 part system
lungs
artery to lungs
vein from lungs to heart
heart
artery
to body
vein from body to heart
body

12. Stops along the way… Lungs Small Intestines Large Intestines Liver
pick up O2 / clean out CO2
Small Intestines
pick up nutrients from digested food
Large Intestines
pick up water from digested food
Liver
clean out worn out blood cells

14. More stops along the way…
Kidneys
filters out wastes (urea)
extra salts, sugars & water
Bone
picks up new red blood cells
Spleen
picks up new white blood cells

16. Circulatory System & Homeostasis
ATP
Need to BALANCE:
Food & O2 in
Energy (ATP) production
CO2 & waste out
Exercise
heart beat faster
need more ATP
bring in more O2 & food; remove more CO2 & waste out O2
CO2
food
waste

17. Blood Movement Right Atrium ____________ _______________
Left Atrium
Left Ventricle
_______
BODY
______________________________ ____________
Right Ventricle
Pulmonary Arteries
LUNGS
Aorta
Superior & Inferior Vena Cava
Movement of BLOOD