View
219
Download
0
Category
Tags:
Preview:
Citation preview
CIRCULATORY SYSTEM
System of vessels and/or spaces through
which blood and/or lymph
flows in a human.
Circulatory system
Has three (3) main parts:
A. the heart
B. blood vessels
C. blood
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
Pulmonary artery
Left atriumLeft Ventricle - pumps O2 rich blood to the body.Right ventricle:
pumps blood from the heart to the lungs
Pulmonary artery
AORTA
Right atrium(contains thepacemaker - sends electricimpulses thatcauses heartmuscles to contract)
The Heart
Pulmonary vein
Septum-thick muscle that separates right half of heart from left half.
VALVES: Flaps of connective tissue between the atria and ventricles that keep blood moving through the heart in one direction.
Blood Flow in the Heart
2 Pathways of Circulationblood FLOW
between the heart & lungs
Carries blood between the heart & the rest of the
body
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
B. VesselsArtery VeinCapillary
Blood Pressure
measure of the force
that blood exerts
against a vessel wall
C. BLOOD:- A liquid tissue consisting of plasma and blood cells in a suspension.
- Transports nutrients, dissolved gases, enzymes, hormones & waste products
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
plasma
platelets
YELLOWISH LIQUID PART OF BLOOD - 90% WATER & 10% PLASMA PROTEIN, DISSOLVED FAT, SALT AND SUGAR
(AID IN CLOTTING)
Four Blood Types
Type A
Type B
Type AB (Universal Receiver)
Type O (Universal Donor)
Blood Type or Donor
Blood Type Recipient
A
B
AB
O
Unsuccessful Transfusion Successful Transfusion
A B AB O
LYMPH LYMPH VESSELSVESSELS
Lymph nodes Lymph
Vessels
Spleen
Thymus
Superior Vena Cava
Heart
A network of vessels that collect fluids lost by blood & returns it to the circulatory system. It produces special white blood cells.
DisordersHYPERTENSION
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.
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.
TAKING CARE OF THE HEART
Recommended