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Integumentary System
A&P chpt 5
Term | Definition |
---|---|
integumentary system | glands, hair, nails & other stuctures |
skin | AKA cutaneous membrane |
epidermis | outer layer |
epidermis | stratified squamous epithelium, no blood vessels present, receives nutrients by diffusion |
keratin | hard, fibrous protein, water repellant |
dermis | AKA stratum corium |
dermis | dense connective tissue that is deeper & usually thicker |
dermis | inner layer |
sensory receptors | specialized endings in the nerves, defect changes in the environment such as heat, cold, pain, pressure & touch |
subcutaneous | not actually a part of the skin, loosely anchors the skin to underlying organs |
subcutaneous | consists largely of loose connective tissue & adipose tissue |
subcutaneous | AKA hypodermis or superficial fascia |
skin color | result of many factors, some genetic, physiologic & environmental |
melanin | basic skin color is caused by this dark pigment |
melanin | produced by the melanocytes in the stratum basale of the epidermis |
albinism | individuals have light skin, no melanin |
carotene | yellowish pigment |
pinkish tint | in the skin, attributable to the blood vessels in the dermis |
nails | thin plates of dead skin |
hair | found on nearly all body surfaces |
hair follicle | has a bundle of smooth muscle attached with it |
sebaceous glands | hair, secretes sebum |
sudoriferous glands | sweat glands |
merocrine | sweat pore, perspiration |
apocrine | axillae, body oder |
merocrine & apocrine | sudoriferous glands |
ceruminous glands | found in ear canal |
ceruminous glands | secretes cerumen (earwax) |
ceruminous glands | modified sweat glands |
functions of the skin | protection, sensory reception, regulation of body temp, synthesis of vitamin D |