THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Blood enters the glomerulus through the afferent arteriole at the vascular pole, undergoes filtration in the glomerular capillaries, and exits the glomerulus through the efferent arteriole at the vascular pole.

Detailed explanation-2: -Blood flows into and away from the glomerulus through tiny arteries called arterioles, which reach and leave the glomerulus through the open end of the capsule. In the renal corpuscle, fluid filters out of the blood in the glomerulus through the inner wall of the capsule and into the nephron tubule.

Detailed explanation-3: -It is because the afferent arteriole, which delivers blood to the glomerulus, has little vascular resistance because it is short and wide. So the pressure decrease is smaller compared to other tissues. And the pressure in capillaries of glomeruli is so high because it is specialized for filtration.

Detailed explanation-4: -Constriction of efferent arterioles as blood exits the glomerulus provides resistance to blood flow, preventing a pressure drop, which could not be achieved if blood were to flow into venules, which do not really constrict. The two arterioles change in size to increase or decrease blood pressure in the glomerulus.