1. Blood Vessels
I. Arteries
 Blood vessels that carry
oxygenated blood away
from your heart to the
different parts of your
body.
 *Arteries nearest your
heart are large as they
get farther from your
heart they branch and
rebranch like a tree.

2. Blood Vessels  Every time your heart
beats your blood rushes
through these large
arteries. Your ventricles
are under high pressure.
These large arteries
expand and absorb that
great pressure.

3. Blood Vessels
 Pulse – steady beating which is brought about by
the flow of blood that is being pumped through one
of your arteries.
1 PULSE= 1 HEART BEAT

4. Blood Vessels
II. Capillaries – came from the Latin
word “capillus” meaning hair
 Place where exchange of materials,
nutrients and gasses occur.

5. Blood Vessels
III. Veins
 Carry non-oxygenated
blood to the heart.
 *Blood in your veins
appear darker because
it has lost oxygen. Blood
moves slower because
it is under great
pressure.

6. Blood Vessels
 Insidethe veins are valves that allows
blood to travel in one direction. If the
blood starts to go backwards the valves
close.

7. HUMAN HEART

8. Parts and Functions of Human
Heart
1. Pericardium – protective membrane that
surrounds the heart.

9. 4 Chambers of the Heart
Atria- collecting chambers
of your heart.
2. Right Atrium – collects
venous unoxygenated
blood from your body.
3. Left Atrium – receives red
oxygenated blood from
your lungs.

10. 4 Chambers of the Heart
Ventricles- pumping
chambers of your heart.
4. Right Ventricle- pumps
blue venous blood out of
your heart and into lungs.
5. Left Ventricle – pumps
oxygenated blood out of
your heart to all parts of the
body.

11. Parts and Functions of Human
Heart
6. Tricuspid Valve – located
between the RA and RV.
7. Bicuspid/Mitral Valve –
located between LA and
LV

12. Parts and Functions of Human
Heart
8. Pulmonary Semilunar
Valve – located
between the RV and
pulmonary artery.
9. Aortic semilunar valve-
located between the LV
and aorta.

13. Parts and Functions of Human
Heart
 10.
Septum – divides your heart into left
and right sides. Prevents the crossing of
blood from one side to the other.

14. Parts and Functions of Human
Heart
 11. Superior Vena Cava
– located at the upper
part of your heart and
brings blood from your
head and arms.
 12. Inferior Vena Cava –
located at the lower
part of your heart and
brings blood from the
lower parts of your body.

15. Parts and Functions of Human
Heart
13. Pulmonary Artery
– carries
deoxygenated
blood from your RV
to the lungs.
14. Pulmonary Vein –
brings back
oxygenated blood
from the lungs to the
LA.

16. Parts and Functions of Human
Heart
 15.Aorta –largest artery in the body.
Brings oxygenated blood to al parts of the
body.