Back to Projects
JOIN WHATSAPP GROUP
Free PSC MCQ 4 Lakhs+
Please Write a Review
Current Affairs 2018 to 2022
PYQ 1200 Q/A Part - 1
PYQ 1200 Q/A Part - 2
PYQ 1200 Q/A Part - 3
PYQ 1200 Q/A Part - 4
PYQ 1200 Q/A Part - 5
Kerala PSC General Science Book Study Materials Page 434
Book's First PagePlatelets or Thrombocytes or Yellow Blood Veins Cells These are the blood vessels that carry These are small cell fragments responsible deoxygenated blood back to the heart. for the clotting of blood and the formation It contains about 75% of blood. of scabs. The walls of the veins are thinner than the They form in the red bone marrow from arteries. large megakaryocyte cells that periodically Venules are known as the smallest of the rupture and release thousands of pieces of veins. membrane that become the platelets. It has no pulse and blood travels smoothly. They do not contain a nucleus and only Capillary survive in the body for up to a week before macrophages capture and digest These are the smallest blood vessels in the them. body. It contains about 5% of blood at any time, Plasma and no pulse can be felt in one. These blood vessels are act as a link It is the non-cellular or liquid portion of between arteries and veins. the blood that makes up about 55% of the It has a single layer of endothelial cells. blood’s volume. Water and other small molecule Approximately, 90% of blood plasma is substances can pass through this wall. water and remaining 10% are proteins, inclusions and waste products etc. Atrium : Either of the two (left and right) The plasma functions as a transportation upper chambers of the heart. Also called medium for these substances as they move auricles throughout the body. Pulmonary : Used to describe blood vessels that carry blood between the heart and the Blood Vessels lungs These are the tubular structure carrying blood Aorta : The largest artery which directs blood through the tissues and organs to every organ but the lungs There are three major types of blood vessels: Lumen : The inner open space of a tubular arteries, capillaries and veins. organ, in this case the blood vessels Arteries Vena Cava : Either of two large veins which carry blood into the right side of the heart These are the blood vessels that carry the Cardiovascular : Of or involving the heart oxygenated blood away from the heart. and blood vessels It contains about 20% of blood at any one time. Heart Their walls are thick and elastic. It is a muscular organ about the size of a They have small lumen (tubular cavities closed fist that functions as the body’s inside). circulatory pump. They also help to push the rapid flow of It takes in deoxygenated blood through the blood when the ventricles are relaxed and veins and delivers it to the lungs for the heart is refilling. oxygenation before pumping it into the various Arterioles are known as the small arteries. arteries. It has a pulse and blood travels in spurts. 433