You've lost your interest in sex. Having little or no desire in the sack could be a side effect of a thyroid disorder. Too little thyroid hormone could be a contributor to a low libido, but the cumulative impact of other hypothyroidism symptomsâweight gain, low energy, and body aches and painsâcould also play a part.
Excretion is the process by which metabolic wastes and other non-useful materials are eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life. For example, in mammals urine is expelled through the urethra, which is part of the excretory system. In single-celled organisms, waste products are discharged directly through the surface of the cell.
Excretion and the liver Excretion in mammals Excretion is the removal of potentially harmful or toxic substances from the body. These substances are usually waste materials produced by complex chemical reactions taking place in living cells.Enzymes catalyse the reactions.he urea and water are released from the liver cells to the bloodstream and transported to the kidneys where the blood is filtered and the urea is passed out of the body in the urine.