Lungs : Human lungs eliminate around 18L of carbon-di-oxides per day and about 400ml of water per day in normal resting condition. Different volatile materials are also readily eliminated through the lungs.
Skin:
Human possess two types of glands in skin :
(1) Sweat glands : These excrete sweat, Sweat contain 99.5%, Water, NaCl, Lactic acid, Urea, Amino acid and glucose. The primary function of sweat is to facilitate a cooling effect on the body surface.
(2) Sebaceous glands :These secrete sebum which contain waxes, sterols, other hydrocarbons and fatty acids. This secretion provides a protective oily covering for the skin.
Integument in many aquatic animals excretes ammonia in surrounding medium by diffusion.
Liver:
Liver is the main site for elimination of cholesterol, bile pigments (bilirubin & biliverdin), degraded steroid hormones, some vitamins and drugs. Bile carries these materials to the intestine from where they are excreted with the faeces.
Lungs : Human lungs eliminate around 18L of carbon-di-oxides per day and about 400ml of water per day in normal resting condition. Different volatile materials are also readily eliminated through the lungs.
Skin:
Human possess two types of glands in skin :
(1) Sweat glands : These excrete sweat, Sweat contain 99.5%, Water, NaCl, Lactic acid, Urea, Amino acid and glucose. The primary function of sweat is to facilitate a cooling effect on the body surface.
(2) Sebaceous glands :These secrete sebum which contain waxes, sterols, other hydrocarbons and fatty acids. This secretion provides a protective oily covering for the skin.
Integument in many aquatic animals excretes ammonia in surrounding medium by diffusion.
Liver:
Liver is the main site for elimination of cholesterol, bile pigments (bilirubin & biliverdin), degraded steroid hormones, some vitamins and drugs. Bile carries these materials to the intestine from where they are excreted with the faeces.