Excretory System . Chantal Lima & Carolina Cardenas. Table Of Contents . Vocabulary Waste Problems Learning About The Excretory System Excretory System Functions The Human Excretory System What Is Excretory System Components Of The Excretory System The Kidney White Cells Liver
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The trillions of cells that make up our bodies are working all the time. Their activities produce waste problems, were allowed to build up, the body would become poisoned and die. Fortunately, the body has a very efficient system for getting rid of wastes and other harmful substances. Called the excretory system, it is a complicated system whose parts are found though the body.
Excretation is a basic as eating. Scientist learning a grate deal about the excretory system in the late 1800’s and the early part of this century. This knowledge resulted in many treatments for excretory problems, including kidney dialysis matches that act as artificial kidney and techniques for transplanting kidneys from one person to another.
2) Remove and concentrate waste products from body fluids as necessary for homeostasis.
3) Eliminate excretory products from the body.
The urinary system is made-up of the kidneys, ureters, bladder, and urethra. The nephron, an evolutionary modification of the nephridium, is the kidney's functional unit. Waste is filtered from the blood and collected as urine in each kidney. Urine leaves the kidneys by ureters, and collects in the bladder. The bladder can distend to store urine that eventually leaves through the urethra.
The excretory system removes water, waste material and harmful substances from the body. This process is called excretion or elimination. The lungs, skin, kidneys and lower intestine are involved in excretion. The urinary system is considered part of the excretory system. The kidneys and bladder are parts of the urinary system. Solid wastes are removed from the body through the intestine during bowel movements.
2) White Blood Cells
A kidney has 1,000,000 nephron, which are like little mini-organs. They have there own circulation system, meaning they have their own blood supply, an arteriole, a venue, and some capillaries. It also has a tube connecting it to the ureter.
Whenever a germ or infection enters the body, the white blood cells snap to attention and race toward the scene of the crime. The white blood cells are continually on the lookout for signs of disease. When a germ does appear, the white blood cells have a variety of ways by which they can attack.
The liver is the largest glandular organ of the body. It weighs about 3 lb. It is reddish brown in color and is divided into four lobes of unequal size and shape. The liver lies on the right side of the abdominal cavity beneath the diaphragm.
The skin is the body's largest organ. It protects us against sunlight, injury, and infection. It helps regulate body temperature, stores water and fat, and produces vitamin D. The skin has two main layers: the outer epidermis and the inner dermis.
The Lungs are paired organs in the chest that perform respiration. Each human has two lungs. Each lung is between 10 and 12 inches long. The two lungs are separated by a structure called the mediastinum.