URINARY SYSTEM INFORMATION- PROCESS OF PRODUCTION OF URINE-LESSON 74

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In this lesson we will learn about production of urine by urinary system.  The process of production of urine starts from the blood entry to the kidney. Blood enters into each kidney from two arteries such as the right and left renal arteries (both arteries in combination called aorta). The blood enters into the kidneys through the renal arteries through the hilum a depression inside the core of the kidney and the arteries branch into smaller and smaller arteries. The smallest arteries are called arterioles. These are situated all the way through the cortex.

Blood constantly move across these small arterioles. This flow is very crucial. Kidneys have their own special device to maintain this blood flow consistently. If blood pressure falls, the flow of blood is diminished. Kidney produces a hormone called renin and released it into the blood. This hormone stimulates the narrowing or contraction of arterioles and so blood pressure increased and blood flow in the kidneys is reinstated to customary.

Capillaries are the smaller blood vessels that are twisted and interlinked branches from each arteriole in the cortex of the kidney. The capillaries in collection form a small ball like structure called glomerulus. There are about one million glomeruli (singular-glomerulus) in the cortex of each kidney.

That's all...

In the next lesson we will learn about the process of filtration by kidneys..ok

Come on..

To go to the next lesson from here please click the link below


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