excretory system and their organs and it's function
Answers
1)kidney:
Kidneys are bean-shaped organs of a reddish brown colour that are found in the
sides of the vertebral column. Once the body has extracted what it needs from food
and drink, it sends the wastes to the kidneys. The kidneys filter the wastes,
including urea, salt and excess water, which are flushed out of the body as urine.
2)skin:
The skin performs its excretory function via the sweat glands. These glands produce
sweat that contains salt, excess oils, water, and other unnecessary substances which
are then excreted out of the body through small pores.
3)lungs:
The lungs are very important excretory organs as they expel carbon dioxide from
the body via exhalation. The lungs use cells known as alveoli to remove the carbon
dioxide from our blood. Otherwise, the carbon dioxide would accumulate and have
a detrimental effect to our body
4)liver:
the liver
plays a vital part in keeping the body clean. Harmful poisons and chemicals that are
either produced in the body or consumed are broken down and detoxified by the
liver. For example, a bi-product of the metabolic process within the body is
ammonia and the liver processes this into urea, a less harmful substance which
continues to be filtered and excreted by the kidneys as urine
5)Gall bladder:
assists the overall process. Bile, a
liquid produced by the liver to break down waste, is first stored in the gallbladder
. When needed, it is discharged into the small intestine whose role is to break down
fats, ethanol and other acidic wastes
6)urinary bladder:
The waste fluid that is created in the liver and collected in the kidney is transferred
into the urinary bladder where it is temporarily stored until the individual urinates.
The urinary bladder provides a short-term solution for storing urine in the body
until it is ultimately discharged
7)ureters:
The ureters tubes of smooth muscle fibre transfer liquid waste from the kidneys into
the urinary bladder. The urine is moved with peristaltic movements which force the
urine away from the kidneys. The ureters also have ureterovesical valves which
ensure the waste fluid does not travel back into the kidney
8)urethra:
The urethra runs through the penis in males, and serves as a carrier of semen as well
as urine for their ultimate discharge out of the body. The urethra tube is shorter in
females and is just above the vaginal opening.
9)large intestine:
he undigested substances are transferred to the large intestine which essentially
serves as a storage organ for the excretory products. The descending, ascending and
transverse colons also facilitate the absorption of leftover vitamins, water and salt.
The distal straight section (known as the rectum) is used for the storage of waste
products (faeces) before they are excreted from the body via the anal canal with the
help of internal and external sphincters