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Published byÉlise Fontaine Modified over 5 years ago
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Circulatory rap
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Circulatory System Structures
Heart Blood Vessels Arteries Veins Capillaries Blood
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Circulatory System Function
The overall function of the circulatory system is to transport materials throughout the body toward and away from particular target organs and tissues.
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What is Blood Made of? CANDY RED HOTS 44%: Red Blood Cells (RBCs) - carry oxygen and carbon dioxide around body, RBCs only live for about 3 months but are continuously produced in the bone marrow. CORN SYRUP 55%: Plasma/Water - syrupy, thick, clear, yellowish liquid that carries dissolved food and wastes in water. WHITE JELLY BEANS 1/2%: White Blood Cells (WBCs) - bigger than RBCs, oddly-shaped cells that 'eat' bits of old blood cells and attack germs. CANDY SPRINKLES 1/2%: Platelets - bits of cells and cytoplasm that help your blood clot.
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Two Pathways Pulmonary Circulation Systemic Circulation
Carries blood to lungs and back to the heart Systemic Circulation Carries blood to body and back to the heart
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Capillaries of head and arms
Capillaries of abdominal organs and legs Inferior vena cava Pulmonary vein Capillaries of right lung Superior vena cava Aorta Pulmonary artery Capillaries of left lung
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Your Blood Vessels: Pathway of Circulation
3 types of vessels Arteries Capillaries Veins
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Artery vs. Vein
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Arteries: carries blood Away from heart
Large Thick-walled, Muscular Elastic Oxygenated blood Exception Pulmonary Artery Carried under great pressure Steady pulsating Arterioles: smaller vessels, enter tissue
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Capillaries Smallest vessel Microscopic Walls one cell thick
Nutrients and gases diffuse here
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Veins: Carries blood to heart
Carries blood that contains waste and CO2 Exception pulmonary vein Blood not under much pressure Valves to prevent much gravity pull Venules: larger than capillaries
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Varicose Veins Damaged Valves in Veins
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Your Heart: The Vital Pump
At REST, the heart pumps about 5 QUARTS of blood a minute. During EXTREME EXERTION (exercise) it can pump 40 quarts a minute.
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Heart: Structure and Function
Keeps blood moving Large organ composed of Cardiac muscle
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Structure of Heart Four chambers Two upper (Atria) Right Atria
Left Atria Two lower (Ventricles) Right Ventricle Left Ventricle
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Bloods Path Through the Heart
Both Atria fill at same time Rt atrium receives oxygen POOR blood from body via the vena cavas Left atrium receives oxygen RICH blood from lungs through four pulmonary veins After filled with blood atria contract, pushing blood into ventricle
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Both ventricles contract
Right ventricle contracts and pushes oxygen-poor blood toward lungs, against gravity, through pulmonary arteries
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Bloods Path Through the Heart (cont)
Left ventricle contracts and forces oxygen rich blood out of heart through aorta (largest vessel)
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The Blood Body contains 4-6 L Consists of Water Red Blood Cells Plasma
White blood cells and platelets
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Erythrocytes (RBC) Transporters of
Oxygen Carbon Dioxide RBC are produced in red bone marrow of ribs, humerus, femur, sternum, and other long bones
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Leukocytes (WBC) WBC fight infection Less abundant Large cells
Attack foreign substances Less abundant Large cells
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Platelets PLATELETS are for CLOTTING blood Cell fragments
Produced in bone marrow Fibrin (sticky network of protein fibers) Form a web trapping blood cells
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Blood Clotting Section 37-2 Break in Capillary Wall
Blood vessels injured. Clumping of Platelets Platelets clump at the site and release thromboplastin. Thromboplastin converts prothrombin into thrombin.. Clot Forms Thrombin converts fibrinogen into fibrin, which causes a clot. The clot prevents further loss of blood..
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Blood Types Massive loss of blood requires a transfusion Four Types
AB O Inherited from your parents
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Blood Types
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What happens when you mix blood types?
Plasma contains proteins that correspond to the shape of the different antigens If you mix one type with the wrong one, you get CLUMPING Type O is the universal donor Type AB is the universal acceptor
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What Makes Our Blood Type?
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Blood Transfusions Blood Type of Donor Blood Type of Recipient
A B AB O A B AB O Unsuccessful transfusion Successful transfusion
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Rh Factor Rhesus factor (Rh), also inherited
Rh+ (have antigen) Rh- (NO antigen) Can cause complications in pregnancies mother Rh- 1st baby Rh+ : blood mixes with mother; mother’s body makes anti-Rh+ antibodies 2nd Rh + body attacks baby Now have medicine to prevent antibody formation
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Getting to the Heart of the Matter
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ENGAGE 1. Walt Disney’s 1957 “Hemo the Magnificent”
2. Play song from St. Joseph’s Aspirin Commercial (originally in Happy Days episode) at:
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Lyrics Pump, pump, pumps your Blood.
The right atrium’s where the process begins, where the CO2 Blood enters the heart. Through the tricuspid valve, to the right ventricle, the pulmonary artery, and lungs. Once inside the lungs, it dumps its carbon dioxide and picks up its oxygen supply. Then it’s back to the heart through the pulmonary vein, through the atrium and left ventricle. Pump, pump, pumps your Blood.
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Bill Nye Circulatory System
(22 min)
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