please give the explanation of this diagram..will mark as BRAINLIEST ANSWER
actually I can't learn these diagrams without understanding it..it's of bio and tomorrow is my final exam of it in which I have promised to my teacher that I will score full in it..please tell fast..
Note-when I will be back home tomorrow after giving the exam I will surely share that how was my exam with you all.
Answers
Answer:
Blood is carried through the body via blood vessels. An artery is a blood vessel that carries blood away from the heart, where it branches into ever-smaller vessels. Eventually, the smallest arteries, vessels called arterioles, further branch into tiny capillaries, where nutrients and wastes are exchanged, and then combine with other vessels that exit capillaries to form venules, small blood vessels that carry blood to a vein, a larger blood vessel that returns blood to the heart.
Arteries and veins transport blood in two distinct circuits: the systemic circuit and the pulmonary circuit (Figure 1). Systemic arteries provide blood rich in oxygen to the body’s tissues. The blood returned to the heart through systemic veins has less oxygen, since much of the oxygen carried by the arteries has been delivered to the cells. In contrast, in the pulmonary circuit, arteries carry blood low in oxygen exclusively to the lungs for gas exchange. Pulmonary veins then return freshly oxygenated blood from the lungs to the heart to be pumped back out into systemic circulation. Although arteries and veins differ structurally and functionally, they share certain features.
This diagram shows how oxygenated and deoxygenated blood flow through the major organs in the body.
Figure 1. Cardiovascular Circulation. The pulmonary circuit moves blood from the right side of the heart to the lungs and back to the heart. The systemic circuit moves blood from the left side of the heart to the head and body and returns it to the right side of the heart to repeat the cycle. The arrows indicate the direction of blood flow, and the colors show the relative levels of oxygen concentration.
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hey mate here is your answer
this diagram basically shows how the capillaries form a connection between arteries and veins.
the arteries deliver oxygen rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs...
the capillaries then deliver CO2 rich blood to the veins ...
therefore arteries end in capillaries and veins begin with the capillaries