Question

A.Mention any 2 components of blood. B.Trace the movement of oxygenated blood in the body. C.Write the functions of valves present in between atria and ventricles. D.Write one structural difference between artery and veins

Answer 1

Dear student, a= plasma,rbcs. B=Oxygenated blood moves from the lungs to the left atrium (upper chamber of the heart on the left). The atrium has a thin wall. The blood is collected in the left atrium when the left atrium relaxes. As soon as the left atrium contracts, the left ventricle expands and blood is transferred to the left ventricle. Then, the left ventricle contracts and the blood is pumped to other parts of the body. C= The heart features four types of valves which regulate the flow of blood through the heart. These valves permit blood flow only in one direction, and prevent back flow of blood. The four types of valves are: 1) Tricuspid Valve: This valve separates the right atrium from the right ventricle, and regulates the blood flow between them. Tricuspid valves allow blood to flow from the right atrium into the right ventricle, and prevent back flow of the same. 2) Pulmonary Valve: This valve separates the right ventricle from the left pulmonary artery. These valves prevent the control the flow of blood from the right ventricle into the left pulmonary artery. 3) Mitral Valve: Bicuspid valve or Mitral valve separates the left ventricle from the left atrium. 4) Aortic Valve: This valve separates the left ventricle from the aorta, and controls the blood flow from the ventricle into the rest of the body. D=Artery carries blood away from heart and vein carries blood towards the heart. An artery is thicker than a vein, in terms of their structures. Artery is a resistance vessel while vein is a capacitance vessel. Arteries carry oxygenated blood and veins carry deoxygenated blood.