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

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Presentation on theme: "CIRCULATORY SYSTEM System of vessels and/or spaces through which blood and/or lymph flows in a human."— Presentation transcript:

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


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