Anatomy Chapter 6 The Integumentary System
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| Define Integumentary System | The integumentary system is skin and accessory organs such as hair, nails,sebaceous glands and sweat glands
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| Define cutaneous membrane | One of the largest most versatile organs. Vital in maintaining homeostasis.Protective covering, helps regulate body temperature, retards water loss from deeper tissue, house sensory receptors, synthesizes biochemicals, excrete wastes.
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| Define Epidermis | The outerlayer of the skin that is composed of stratified squamous epithelium
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| Define dermis | The inner layer of the skin that is composed of connective tissues with collagen and elastic fibers, epithelial tissue, smooth muscle tissue, nervous tissue and blood.
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| Define subcutaneous layer | A layer beneath the skin composed of loose connective and adipose tissues
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| Define keratinization | The process where older cells called keratinocytes harden and the cytoplasm fills with strands of a tough,fibrous, water-proof keratin protein
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| Define Melanin | A dark pigment produced by melanocytes in the epidermis that provides skin color
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| Define hair follicle | Tubelike depression in the epidermis in which a hair develops.
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| Define sebaceous glands | Skin gland that secretes sebum. It contains groups of specialized epithelial cells and are usually associated with hair follicles.
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| Define nails | Protective coverings on the ends of fingers and toes
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| Define sweat glands | Exocrine glands that are widespread in the skin that secretes a mixture of water, salt, urea, and other bodily substances.
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| Define inflammation | Tissue response to stress that dilates blood vessels and accumulates fluid in the affected region.
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| How does your body regulates its temperature? | When bod temp rises above set point, the nervous system stimulates structures in the skin+organs to release heat. When skin's cold, the nervous syst stimulates the eccrine sweat glands to become active and to release sweat onto the skin surface.
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| How do wounds on your skin heal? | If a break in the skin is shallow, epithelial cells along its margin are stimulated to divde more rapidly than usual, and the newfly formed cells fill the group. If wound's deepeer, blood vessels break
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| What are the two types of sweat glands and where are they most numerous, when are they activated and what is their purpose? | Eccrine and apocrine. Eccrine is most numerous_ respond to elevated blood temperature. Apocrine activated by emotional upsetness fear or pain, most numerous in axillary regions and groin, similar to eccrine. Modified sweat glands: ceruminous, mammary
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