4
The Skin
The skin excretes cellular wastes through the sweat glands. Sweat consists of a mixture of cellular wastes, such as salts, urea, and water. So, when you sweat, your body accomplishes two things: first, your body temperature is cooled; and second, cellular wastes leave the body.
Capillaries are intertwined with the coiled mass of the sweat gland. Sweat forms when blood in the capillaries passes by the coiled sweat gland in the dermis. Metabolic wastes diffuse into the sweat gland from the capillary. When body temperature rises, sweat is released from the gland and travels through the epidermis out of a pore in the skin.
The skin excretes cellular wastes through the sweat glands. Sweat consists of a mixture of cellular wastes, such as salts, urea, and water. So, when you sweat, your body accomplishes two things: first, your body temperature is cooled; and second, cellular wastes leave the body.
Capillaries are intertwined with the coiled mass of the sweat gland. Sweat forms when blood in the capillaries passes by the coiled sweat gland in the dermis. Metabolic wastes diffuse into the sweat gland from the capillary. When body temperature rises, sweat is released from the gland and travels through the epidermis out of a pore in the skin.
The Excretory System
Vocabulary
Dermis: The inner layer of skin in humans which holds nerve cells, hair follicles, and sweat glands.
Epidermis: The outer layer of skin, consists mainly of dead skin cells.
Pore: An opening in the epidermis to the inner layers of skin.
Dermis: The inner layer of skin in humans which holds nerve cells, hair follicles, and sweat glands.
Epidermis: The outer layer of skin, consists mainly of dead skin cells.
Pore: An opening in the epidermis to the inner layers of skin.