Organs of excretion make up the excretory system. They include the kidneys, large intestine, liver,
skin, and lungs. The kidneys filter blood and form urine. They are part of the urinary system,
which also includes the ureters, bladder, and urethra.
Kidneys
The kidneys' job is to filter your blood. They remove wastes, control the body's
fluid balance, and keep the right levels of electrolytes. All of the blood in your
body passes through them several times a day. Blood comes into the kidney,
waste gets removed, and salt, water, and minerals are adjusted, if needed.
Large Intestine
The 4 major functions of the large intestine are recovery of water and electrolytes,
formation and storage of faeces and fermentation of some of the indigestible food
matter by bacteria. The ileocaecal valve controls the entry of material from the last part
of the small intestine called the ileum.
Liver
The liver's main job is to filter the blood coming from the digestive tract, before passing
it to the rest of the body. The liver also detoxifies chemicals and metabolizes drugs. As
it does so, the liver secretes bile that ends up back in the intestines.
skin
It holds moisture into every part of your body. In the excretory system, the skins job is
to regulate one's body temperature. The salt in the skin helps in evaporation of the
water off of the body, to cool off one who is hot. Sweat is excreted through sweat
glands.
Lungs
The organs of your excretory system help to release wastes from the body. The
organs of the excretory system are also parts of other organ systems. For example,
your lungs are part of the respiratory system. Your lungs remove carbon dioxide from
your body, so they are also part of the excretory system.
Uretha
Urethra. Urethra, duct that transmits urine from the bladder to the exterior of the body
during urination. The urethra is held closed by the urethral sphincter, a muscular
structure that helps keep urine in the bladder until voiding can occur.
Bladder
The urinary bladder is the organ that collects waste excreted by the kidneys prior to
disposal by urination. It is a hollow muscular, and distensible (or elastic) organ, and sits on
the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra.
Uretha
Urethra. Urethra, duct that transmits urine from the bladder to the exterior of the body
during urination. The urethra is held closed by the urethral sphincter, a muscular structure
that helps keep urine in the bladder until voiding can occur.