poverty in our country

Topics: Skin, Organ / Pages: 3 (747 words) / Published: Oct 14th, 2013
"Integumentary " redirects here; in botany, an integument refers to an outer membrane of an ovule, which develops into the testa, the seed coat
The integumentary system is the organ system that protects the body from various kinds of damage, such as loss of water or abrasion from outside.[1] The system comprises the skin and its appendages[2][3] (including hair, scales, feathers, hooves, and nails). The integumentary system has a variety of functions; it may serve to waterproof, cushion, and protect the deeper tissues, excrete wastes, and regulate temperature, and is the attachment site for sensory receptors to detect pain, sensation, pressure, and temperature. In most terrestrial vertebrates with significant exposure to sunlight, the integumentary system also provides for vitamin D synthesis.
Skin is the soft outer covering of vertebrates. Other animal coverings such as the arthropod exoskeleton have different developmental origin, structure and chemical composition. The adjective cutaneous means "of the skin" (from Latin cutis, skin). In mammals, the skin is the largest organ of the integumentary system made up of multiple layers of ectodermal tissue, and guards the underlying muscles, bones, ligaments and internal organs.[1] Skin of a different nature exists in amphibians, reptiles, and birds.[2] All mammals have some hair on their skin, even marine mammals which appear to be hairless. The skin interfaces with the environment and is the first line of defense from external factors.
"Integumentary " redirects here; in botany, an integument refers to an outer membrane of an ovule, which develops into the testa, the seed coat
The integumentary system is the organ system that protects the body from various kinds of damage, such as loss of water or abrasion from outside.[1] The system comprises the skin and its appendages[2][3] (including hair, scales, feathers, hooves, and nails). The integumentary system has a variety of functions; it may serve to waterproof,

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