1. Cardiovascular system: Heart and blood vessels

2. Two parts:
Heart
Blood vessels
Arteries - away
Capillaries –exchange
Veins – to

3. Two circuits:
Pulmonary – to and from lungs
Systemic – to and from body

4. Functions of the cardiovascular system:
Blood pressure
O2 rich from O2 poor
1 way flow –valves
Gas exchange – tissues and lungs

5. arteries (arterioles), capillaries, veins (venules)
artery
blood
flow
valve
precapillary
sphincter
Blood vessels:
arteries (arterioles), capillaries, veins (venules)

6. External Anatomy heart sternum lung left cardiac vein
right coronary artery
Left coronary artery
pericardium
Right atrium
Left ventricle
Right ventricle

7. Internal Anatomy
pulmonary
vein
semilunar
valves
aorta
left
atrium
right
atrium
septum
left
ventricle
right
ventricle

8. Passage of blood through the heart

10. Cardiac cycle semilunar valves close (“dup”) pulmonary vein superior
vena cava
valves
pulmonary
vein
aorta
right
atrium
ventricle a. b.
atrio ventricular (AV)
(“lub”) c.
inferior
left

11. Intrinsic and Extrinsic control of heart beat
SA node
AV node
branches of
atrioventricular
bundle
Purkinje fibers

12. Features:
Blood pressure
Pulse
What keeps blood moving in:
Arteries
Capillaries
veins

13. What keeps blood moving in:
Arteries
Capillaries
Veins
Skeletal muscle pump
Respiratory pump
valves

14. Exchange at capillaries
from heart
Arterial End
Blood pressure is higher
than osmotic pressure.
Net pressure out.
water
oxygen
amino
acids
Tissue Fluid
glucose
carbon
dioxide
wastes
arteriole
smooth
muscle fiber
blood pressure
osmotic pressure
plasma
protein
Venous End
Osmotic pressure is higher
than blood pressure.
Net pressure in.
venule
to heart
salt

15. Cardiovascular Pathways

16. Arteries and veins to know

17. Exceptions…