The circulatory system is comprised of the cardiovascular and lymphatic systems. The cardiovascular system transports blood throughout the body using the heart, blood vessels, and blood. The heart is a muscular pump made up of chambers and valves that circulate blood through two circuits: pulmonary circulation to the lungs and systemic circulation to the body. Blood vessels include arteries, veins, and capillaries that transport blood and exchange materials. Blood contains plasma, red blood cells, white blood cells, and platelets that provide nutrients, oxygen, waste removal, and immunity.

2. Circulatory System
•Responsible for
transporting materials
throughout the entire
body.

3. Circulatory System
• Transports nutrients, water
and oxygen.
• Heals and fights infections.
• Removes wastes.

4. Circulatory System
•Two divisions:
1. Cardiovascular System
2. Lymphatic System

5. Circulatory System
•Two divisions:
1. Cardiovascular - blood
2. Lymphatic - lymph

6. Cardiovascular System
•Transports nutrients,
gases, hormones, and
other materials to and
from the cells of the body.

7. Cardiovascular System
•Parts:
1. Heart
2. Blood Vessels
3. Blood

8. 1. Heart
•Muscular organ(strongest
muscle) that pumps blood
to the different parts of
the body.

9. Heart
• Structure:
1. Pericardium - sac
2. Pericardial Cavity – filled with fluid
3. Epicardium – outer layer
4. Myocardium – middle layer
5. Endocardium – inner layer

10. Heart
•Parts
1. Chambers
2. Valves
3. Blood Vessels

11. Chambers of the Heart
•Four: Right and Left
Atrium and Right and
Left Ventricle.

12. Chambers of the Heart
•Atria- receiving chambers
•Ventricle- pumping
chambers

13. Chambers of the Heart
• Right Atrium- receives
deoxygenated blood from vena
cava.
• Left Atrium- receives oxygenated
blood from pulmonary veins.

14. Chambers of the Heart
• Right Ventricle- pumps blood
deoxygenated blood from RA to
pulmonary artery to lungs for oxygenation
• Left Ventricle-pumps oxygenated blood
from LA to the aorta to all parts of the
body.

15. Blood Vessels in the Heart
• Aorta – largest artery. Conveys oxygen rich blood
from the LV to all parts of the body.
• Superior Vena Cava – conveys deoxygenated blood to
the RA.
• Pulmonary Artery – conveys deoxygenated blood
from RV to the lungs.
• Pulmonary Veins – Convey oxygenated blood back to
the LA.

16. Valves of the Heart
• Atrioventricular/cuspid valves –
between atria and ventricles.
• Semilunar Valves – located at the
bases of the heart’s blood vessels
and the ventricles.

17. Atrioventricular Valves of the Heart
• Tricuspid Valve – between right
atrium and right ventricle.
• Bicuspid Valve – between left atrium
and left ventricle.

18. Semilunar Valves of the Heart
• Pulmonic Valve – between right
ventricle and pulmonary artery.
• Aortic Valve – between left ventricle
and aorta.

19. 2. Blood Vessels
• Network of channels that convey
blood to all parts of the body.
• Three types: Artery, Vein and
Capillaries

20. 2. Blood Vessels - Artery
• Conveys oxygen rich blood away
from the heart.
• Arterioles – smallest arteries.
• Aorta – largest artery.
• Elastic

21. 2. Blood Vessels - Artery
• Parts
1. Tunica Externa
2. Tunica Media
3. Tunica Intima

23. 2. Blood Vessels - Vein
• Convey blood coming from the body
back to the heart.
• Venules – smallest veins.
• Vena Cava – largest vein.

24. 2. Blood Vessels - Vein
• Parts:
• Tunica adventitia/externa
• Tunica Media
• Tunica Intima/Interna

27. 2. Blood Vessels - Capillary
• Exchange of materials – gases,
nutrients and waste products of
metabolism.
• Connects arterioles and venules.
• Smallest and thinnest.

29. Pathways of Blood Circulation
• Pulmonary Circulation –
deoxygenated blood returns to the
heart.
• Systemic Circulation – oxygen-rich
blood is distributed to different parts
of the body.

30. 3. Blood
• Is a liquid tissue and the circulating
medium of the circulatory system.
• Portions:
1. Plasma – Liquid portion
2. Corpuscles – formed elements

31. 3. Blood - Corpuscles
• Erythrocytes – red blood cells
• Leukocytes – white blood cells
• Thrombocytes – platelets

33. 3. Blood - Erythrocytes
• Hemoglobin – makes it color red. An
iron-containing molecule that can
bind with oxygen.

34. 3. Blood - Leukocytes
• Defends the body against both
infectious diseases and foreign
materials.

35. 3. Blood - Thrombocytes
•For blood clotting.

36. 3. Blood Groups
•A, B, AB and O
Blood Type Antigens (RBC) Antibodies (Plasma)
A A Anti b
B B Anti a
AB A and B None
O None Anti a and b