organs+2

=media type="youtube" key="8Jqlq4FsXBA" height="234" width="288"The Kidneys The organs 2 by Abe and Ella =

1. Your kidneys weigh about 0.5 percent of your total body weight. 2. The kidneys are small organs by weight, but they receive about 20 percent of the blood pumped by the heart.

== == = = = = = = = = = ﻿ = = = = = =The Bladder=

· Our brain keeps a watch on the bladder and when it is about half full, receptors in your bladder send signals to your spinal cord. · Once the brain gets the signal, you will feel like you need to go to the toilet to empty your bladder. This happens usually four to eight times a day. · the feeling of a need to pass urine may not happen until the bladder has 250 ml of urine in it, and a //really// full bladder can hold 480 ml or perhaps more. · When the urine has passed and the bladder is empty, the muscles switch back into storage mode, and the process starts all over again. This is called bladder control.