The excretory system contains several different organs. These organs are:
the kidney, the skin, the lungs, and the lungs. The nephrons, in the kidneys,
are the ones that actually do the filtering of the blood.
Contributed by: jen <firstname.lastname@example.org>
Thursday, March 09, 2000 at 19:24
Most of you seem unsatisfied with the information here so I thought I'd
add a little on the Kidneys. Feel free to e-mail me if you need anything
specific, I just may be able to help you and I check my e-mail around 4
or 5 times a day THE KIDNEYS The kidneys provide an important filtering
system for the blood. They remove the waste products of chemical reactions
in the body, as well as substances that are in excess amounts, for example
water. If chemical wastes are not removed, they would slowly poison you
by killing all the cells in your body. Urea, made in the liver from unwanted
amino acids, is one chemical excreted by the kidneys. There are two kidneys,
one on either side of the body. Each kidney has a rich blood supply. Approximately
one litre of blood flows through the kidneys per minute. The kidneys remove
waste products from the blood using small filters called nephrons. The
waste products, now called urine, drain into a tube called the ureter that
connects to the bladder. The bladder stores the urine and when it is full
a muscular ring opens up, allowing the urine to go through the outlet tube
called the urethra.
Contributed by: Lara Lawler <email@example.com>
Wednesday, March 01, 2000 at 16:40:47 (EST)
The urinary system includes the kidneys, urinary bladder,
and associated tubes. The kidneys are bean-shaped organs about 10cm long.
They lie against the muscles of the back in the abdomen just below the
diaphram. The kidneys serve two major functions-they removes the wastes
of the cellular metabolism from the blood and they control the concentration
of the various substances found in the body fluids. The kidneys are vital
in maitaining homeostatsis.
Contributed by: Antonella Caruso <firstname.lastname@example.org>
Saturday, December 27, 1997 at 13:51:39 (EST)