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Circulatory system (BLOOD VESSELS (VESSELS (PULMONARY VEINS (Bringing…
Circulatory system
BLOOD VESSELS
ARTERIES
Vessels that carry blood away from the heart to the body organs.Arteries branch into arterioles and then into capillaries.
CAPILLARIES
Microscopic vessels hat connect between the arteries and veins.The converge into venules which converge into veins.he form networks called capillary beds that are present in most body tissues.
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VESSELS
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AORTA
Supplying oxygen-rich blood from the heart to the rest of the body.The aorta branches into:coronary arteries which supply cardiac tissue,an anterior branch leading to the head and arms and a posterior branch[dorsal aorta]leading to abdominal organs and legs.
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BLOOD
RED BLOOD CELLS
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Flattened ,biconcave shape without nucleus or organelles at maturity,increasing he surface area to volume ratio for faster diffusion of oxygen.
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HEART
ATRIA
The atria are the upper chambers of the heart,relatively with thin walls.They collect blood returning to the heart and pump into the ventricles.
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VENTRICLES
Have thick,muscular walls.The left ventricle has thicker walls than the right ventricle,as it has to pump blood to the rest of he body.
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