Excretory System By Jessy Gonzalez Alexis Segura Gaby

Excretory System By: Jessy Gonzalez, Alexis Segura, Gaby Guzman Mrs. . Jolly 4 rth period Science Class

The Excretory System is … The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. The Excretory system is responsible for the elimination of wastes The major function parts of the system are lungs, kidneys , urinary bladder, urethra, ureter, liver , and skin

Diagrams of Major Parts of Excretory System

Kidneys, Bladder (Urinary bladder), Urethra, Ureter Function Kidneys: The kidneys are two bean shaped organs, each about the size of a fist. They are located just below the rib cage on each side of the spine. Every day, the two kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine, composed of waste and extra fluid. Urinary Bladder: The bladder, like the stomach, is an expandable sack that contracts with inner folds when it is empty. The inner lining of the bladder tucks into the folds and expand out to accommodate liquid. Which is urine so in other words it is a sack that holds urine until it is time to go to the restroom. When empty, the bladder’s muscle wall becomes thicker, and the entire bladder becomes firm. Urethra: The urethra is a tube that connects the urinary bladder to the outside of your body and this works as an exit from the you body. Ureter: The ureter is the tube that carries urine from the kidney to the urinary bladder. In humans there are two ureters one attached to each kidney and the upper half. It is located in the abdomen and the lower half is located in the pelvic area. Each ureter enters the bladder through a tunnel in the bladder wall, which is angled to prevent the urine from running back into the ureter when the bladder contracts.

Skin Function Skin is a part of the Excretory system sweat is a crucial part of the excretory system as it is responsible for eliminating sweat from the body. Salt contains several metabolic wastes including urea, salts and water. In addition to excreting metabolic wastes, sweat also cools down the body. The sweat glands are able to receive the various wastes because they are mixed in with capillaries, which are tiny blood vessels. This means that the wastes can diffuse out of the blood and enter the sweat glands before passing out of the skin in the form of sweat.

Liver Function The liver is also a part of the Excretory system. What it does: That the liver produces proteins that are important in blood clothing. It is also one of the organs that break down old or damaged blood cells. The liver is responsible for detoxifying and breaking down any toxins such as chemicals and poisons that enter our bodies. The liver produces bile which the body then uses to help break fats down into unusable waste and usable fats.

Lung Function Last of all are the lung’s function in the Excretory system. As human beings we need cellular respiration to survive or we would die. Cellular respiration produces carbon dioxide and that needs to be eliminated out of our body. When the carbon dioxide diffuse from the cells entering the bloodstream then for it going to the lungs. The lungs have alveoli which diffuse the carbon dioxide from the blood so it can enter the lung tissue and eventually leave the body during exhalation.

Fun Facts The average person pees about 3000 times a year The average person poops about 305 pound of poop a year The human intestine is about 27 inches long and about 10 inches The average adult bladder can hold 16 to 24 ounces of urine If you compare the human brain with the human bladder it is about the similar size and weight The biggest vein in the body is the vein that leads it the vital excretory system, the kidney