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Circulatory System

Circulatory System. Unlike digestive system Circulatory System has no openings . Enclosed tube under pressure. Circulation Chapter 16 page 532. What is the “highway system” in your body?. The Cardiovascular System . Another name for the cardiovascular system?. Circulatory System.

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Circulatory System

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  1. Circulatory System Unlike digestive system Circulatory System has no openings • Enclosed tube under • pressure

  2. CirculationChapter 16 page 532 What is the “highway system” in your body? The Cardiovascular System Another name for the cardiovascular system? Circulatory System What makes up this system? Heart Blood Blood Vessels

  3. What is the role or function of the Circulatory System??? • Carries needed • substances to cells Oxygen ---Glucose---Hormones • Carries waste products • away from cells Carbon Dioxide • Blood contains cells • that help • fight disease Kills microorganisms

  4. What is the role of the circulatory • System in one word? Transport • Describe the Heart Hollow, Muscular Organ Involuntary ---Cardiac Muscle Pump http://www.mydr.com.au/heart-stroke/animation-how-your-heart-pumps About the size of your fist Located behind Sternum Located inside rib cage

  5. Structure of Heart Name the upper chambers of the heart and tell their function Name the lower chambers of the heart and tell their function Heart 2 pumps Septum??? Pacemaker??? Heart Valves??? Receives blood that comes into heart Atrium (plural atria)--- Pumps blood out of heart Ventricles Wall of tissue that separates the right Side of heart from left Group of heart cells in the RA which send out electrical signals to make Heart Muscles contract Strong flap of tissue that prevents blood from flowing backwards Found between chamber and ventricles and arteries

  6. Explain the 2 main phases of the action of the heart Lub-dub---explain how this heart noise is made What happens when the heart muscle relaxes? When atria contract blood moves? • Heart muscle relaxes and fills with blood • Heart muscle contracts and pumps blood forward Blood Flows in one direction Sound heard during pumping phase Contractions closes valvues between atria and ventricles---LUB Valves between ventricles and blood vessels snap shut ---DUB Heart fills with blood Through valves into Ventricles

  7. What happens when the ventricles contract? What is a force? What puts force on blood? Explain what each side of the heart does Valves close between atria and ventricles and blood is pushed/squeezed Into large blood vessels A push or pull Contraction of the Ventricles of the Heart • Right side of heart receives deoxygenated blood from body and pumps it to lungs • Left side of heart received oxygenated • blood from the lungs and pumps blood to all • parts of the body

  8. All parts of the body--- Every single CELL! Where does blood go when it leaves the left side of your heart? Name the 3 types of blood vessels and tell their Function— Draw the pattern of blood flow (what figure does it look like? Blood flow has _________ Loops. • Arteries---carry blood away from heart • Capillaries----connect arteries to veins--- • diffusion of substances • Veins---carry blood back to the heart 2

  9. Deoxygenated blood from body flows into right atrium—through the tricuspid valve- into the right ventricle-through the pulmonary valve-through the pulmonary arteries that branch smaller and smaller Until they reach the alveoli in the lungs where oxygen is picked up and carbon dioxide is dropped off by diffusion Explain Loop 1 in detail----

  10. Explain Loop 2 in detail---- Bright red blood rich in oxygen flows from capillaries to small veins that increase in size as they move closer to the heart. Blood from the pulmonary veins flow into the left atrium---through the mitral valve into the left ventricle through the Aortic valve into the aorta branching into smaller arteries carrying Oxygen to all cells and picking up carbon dioxide.

  11. Explain the role/function of coronary arteries The heart is made of tissue that requires oxygen and nutrients just like the other tissues in your body. The blood that fills the chambers of the heart provide no nourishment to the heart Itself. The heart receives its own supply of blood from coronary arteries. The right and left coronary arteries branch off from the aorta. to the right and left side of the heart. Heart is 2 pumps Right Ventricle-Little Pump Left Ventricle –Big Pump

  12. Work on Blood Flow through Heart

  13. Study all Notes

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