The liver removes amino acids that don't need to be in your body.
Excretory Function .
Some proteins & other nitrogenous compounds are broken down in the liver by a process called deamination. .
Digestive Function .
The liver produces bile, which is temporarily stored in the gall bladder before being released into the small intestine where it helps "emulsify" (break down) lipid molecules.
Circulatory System .
The liver removes & breaks down old red blood cells. The liver is also responsible for removing potentially hazardous chemicals from the blood. .
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THE SKIN.
Sweat comes out of pores in your skin. Sweat is a mixture of three metabolic wastes: water, salts, & urea. So as you sweat, your body accomplishes two things: 1) sweating has a cooling effect on the body, and 2) metabolic wastes are excreted. .
The skin contains two layers, the thin epidermis at the top, and the thicker dermis below. The inner layer of skin (dermis) is where we find oil glands, hair follicles, fatty layers, nerves, and sweat glands. .
The sweat gland is a tubular structure tangled with capillaries (the smallest of blood vessels). This close association of tubes allows wastes (namely water, salts & urea) to diffuse from the blood & into the sweat gland. And then, when body temperature rises, the fluid (sweat) is released from the gland, travels through the tube (duct), & reaches the skin surface through openings called pores, and wastes have left the body.
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THE URINARY SYSTEM.
The Urinary System The process of making go to the bath room. Not as simple as you might think: .
The urinary system is composed of two kidneys, two tubes called ureters, one urinary bladder, and another tube called the urethra. .
There are a couple of blood vessels attached directly to each kidney. The full names of these vessels are the renal artery and the renal vein. .
Three of the four major metabolic wastes produced by the body are filtered from the blood by the kidneys.