Figure 19.4E Gross anatomy of the heart LEFT RIGHT A VERY STRONG MUSCLE!
Chambers of the heart blue=CO2, red =O2 Right AtriumLeft Atrium Right Ventricle Left Ventricle Enters from body. Blood is deoxygenated, but has carbon dioxide. Comes back from lungs with oxygen Goes out to the body with oxygen. Drops of oxygen and picks up carbon dioxide Valve Goes to lungs. Drops off carbon dioxide and picks up oxygen. Valve
Figure 20.17A Pulmonary circulation
Figure 19.5 Systemic & pulmonary circuits Blood from body enters Right Atrium Blood from lungs enters Left Atrium Right Ventricle sends blood to lungs Left Ventricle sends blood to rest of body Arteries carry blood AWAY from the heart Veins carry blood to the heart (like ven in Spanish )
Septum- separates 2 sides of the heart
Mrs. Workman’s research! N1 ΔFC/ΔF C N1 WT/WT H&E E18.5 E16.5 A. B. C.
Misformed valves! N1 ΔFC/ΔFC N1 WT/WT
Figure 19.6 Anatomical differences in the right & left ventricles Why is the left ventricle so much thicker than the right ventricle?
Valves Prevent back flow Between atria and ventricle-open when pressure increases due to a lot of blood in atria Below ventricle-opens when ventricle contracts, pushing blood out through valve. Slamming shut makes your heart beat. What is a pulse?
Figure 19.10A Operation of semilunar valves
Figure 19.10B Operation of semilunar valves
Circulatory system Works closely with system to bring oxygen from the lungs to the muscles and carbon dioxide from the muscles to the lungs to expel.
Blood Vessels Arteries-move blood AWAY from the heart. Thicker walls because more pressure. Vein-moves blood towards the heart. Thinner walls because less pressure. Valves to prevent back flow.
More on Blood Vessels Capillaries-small blood vessels where gas exchange via diffusion takes place.
Components of Blood ComponentFunction Red blood cellsTransport oxygen and carbon dioxide White blood cellsProduce antibodies and destroy invaders-immunity PlateletsFor blood clotting Plasma-liquidCarrying other materials, pH buffering, etc