1. CIRCULATORY SYSTEM
System of vessels and/or spaces through which blood and/or lymph flows in a human.

2. Circulatory system Has three (3) main parts: A. the heart
B. blood vessels
C. blood

3. A. The Heart 1. Main pump of the circulatory system
2. MOVES Blood THROUGH the BODY
3. Surrounded by a loose-fitting
sac called the pericardium.
4. Has four chambers: RIGHT &
LEFT ATRIA, RIGHT & LEFT VENTRICLE

4. The Heart AORTA Left atrium
Pulmonary artery
Pulmonary artery
Right atrium
(contains the
pacemaker - sends electric
impulses that
causes heart
muscles to
contract)
Pulmonary vein
Left atrium
Left Ventricle - pumps O2 rich blood to the body.
Right ventricle:
pumps blood from the heart to the lungs
Septum-thick muscle that separates right half of heart from left half.

5. VALVES: Flaps of connective tissue between the atria and ventricles that keep blood moving through the heart in one direction.

6. Blood Flow in the Heart

7. 2 Pathways of Circulation blood FLOW between the heart & lungs
Pulmonary

8. Carries blood between the heart & the rest of the body
Systemic
Carries blood between the heart & the rest of the body

9. B. BLOOD VESSELS - 1. Arteries - vessels that carry
blood AWAY from the heart.
2. Capillaries - thin-walled blood
vessels in which most of the
exchange of gas, nutrients &
wastes takes place.
3. Veins - vessels that RETURN
blood to the heart. Have valves

10. B. Vessels
Artery
Capillary
Vein

11. measure of the force that blood exerts against a vessel wall
Blood Pressure
measure of the force that blood exerts against a vessel wall

12. C. BLOOD:
- A liquid tissue consisting of plasma and blood cells in a suspension.
- Transports nutrients, dissolved gases, enzymes, hormones & waste products

13. Blood Cells Red blood cells (erythrocytes)
MOST NUMEROUS, DISK-SHAPED, CARRIES O2 TO ALL CELLS IN THE BODY, HEMOGLOBIN
White blood cells (leukocytes)
LARGER IN SHAPE THAN RBC BUT FEWER IN NUMBER, HELP FIGHTS DISEASE

14. YELLOWISH LIQUID PART OF BLOOD - 90% WATER & 10% PLASMA PROTEIN, DISSOLVED FAT, SALT AND SUGAR
platelets
(AID IN CLOTTING)

15. Four Blood Types Type A Type B Type AB (Universal Receiver)
Type O (Universal Donor)

16. A B AB O Blood Type Recipient Blood Type or Donor
Unsuccessful Transfusion
Successful Transfusion

17. LYMPH VESSELS
Superior Vena Cava
A network of vessels that collect fluids lost by blood & returns it to the circulatory system. It produces special white blood cells.
Thymus
Heart
Spleen
Lymph nodes
Lymph Vessels

18. Disorders
Stroke
HYPERTENSION
Low blood
pressure
Heart Attack

19. HYPERTENSION- (“high blood pressure”)
ATHEROSCLEROSIS- NARROWED ARTERIES DUE TO PLAQUE (FATTY DEPOSITS), CAN CAUSE HEART ATTACK OR STROKE.
HYPERTENSION- (“high blood pressure”)
occurs when the force of blood pumping through vessels is too great.
Anemia - when the blood transports too little oxygen.

20. SICKLE-CELL DISEASE Red Blood Cells are misshapened causing blood cells to “CLOG” vessels. Hereditary
Leukemia - a form of cancer where bone marrow produces immature stem cells in large numbers & releasing them into the bloodstream.

21. TAKING CARE OF THE HEART