The document summarizes the functions and components of the circulatory system. It describes that the circulatory system delivers oxygen and nutrients to cells through the blood vessels and heart, removes carbon dioxide and wastes from cells, and fights infections. It provides details on the heart anatomy and chambers, blood composition of cells and plasma, and key functions of arteries, veins, and capillaries in transporting blood throughout the body.

2. Functions:
1. Delivers blood containing oxygen, nutrients, and
hormones to cells
2. Takes carbon dioxide and other wastes from the
cells
3. Fights infections and diseases

3. Functions:
4. Regulates body temperature
5. Helps stabilize pH and ionic concentration of
body fluids

4. Right Atrium
Tricuspid
Valve
Right Ventricle
Left
Ventricle
Left
Atrium
Aortic
Valve
Mitral
Valve
Pulmonary
Valve
Pulmonary
Artery
Coronary
Artery
Aorta

5. HEART
Beats at an average
of 72 per minute
Pumps blood all
throughout the body

6. Myocardium
Pericardium

7. Septum
Ventricles
Atria

8. Left side –
carries oxygenated
blood
Right side –
carries
deoxygenated
blood

9. BLOOD VESSELS
Serves as the “highway” for the blood to go to its
destination
Three types: artery, vein, and capillary

10. ARTERY
Has the thickest wall
Carry oxygen-rich blood away from the heart to
the diff. organs of the body (except for pulmonary
arteries )
aorta
arterioles

11. CAPILLARY
Smallest blood vessel; blood flows in a single line
Has thin walls
Wastes from the cells are removed through them
Responsible for the distribution of nutrients and
oxygen to the cells
Connects artery to the vein

12. VEIN
Thinner walls than arteries
Carries deoxygenated blood to the heart ( except
pulmonary veins )
Superior and inferior vena cava
venules

14. BLOOD
Body fluid that circulates all throughout the body
Bring oxygen, nutrients
and hormones
Removes carbon dioxide and metabolic wastes
Fights infections and diseases
Regulates body temp

15. BLOOD
Body fluid that circulates all throughout the body
Composed of blood cells and plasma
Light, yellow liquid
Largest component

16. BLOOD
Body fluid that circulates all throughout the body
Composed of blood cells and plasma
Blood cells: red blood cells, white blood cells,
platelets

17. Red Blood Cells (RBC)
Also known as erythrocyte; formed in bone marrow
Biconcave disk shape, no nucleus
Contains hemoglobin, life span of 120 days

18. White Blood Cells (WBC)
Also known as leucocytes
Protects the body against infections
Has life span of 3 days to few months
bacteria
viruses
fungi

19. Platelets
Also known as thrombocytes
Smallest blood cell among cells
Responsible for blood clotting
No nucleus and is irregular shape