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By: Jeremyah L. Rodriguez

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Protection

Microorganism, dehydration, ultraviolet light, mechanical damage

Sensation

Sense pain, temperature, touch, deep pressure

Allows movement

Allows movement muscles can flex & body can move

Endocrine

Vitamin D production by your skin

Excretion

Water, urea, ammonia

Immunity

Helps alert the body of pathogens

Regulate Temperature

By sweating to cool and shivering to warm

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The integumentary system covers the surface of the embryo (skin) and its specialized skin structures including hair, nails, sweat glands, mammary glands and teeth. ... Ectoderm forms the surface epidermis and the associated glands. Mesoderm, from the somites, forms the underlying connective tissue of dermis and hypodermis.

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(horny layer) 20 to30 cell layers thick that accounts for up to ¾ of the epidermal thickness. Keratin and thickened plasma membranes of cells protect the skin against abrasion and penetration and glycolipids b/w its cells waterproofs this layer. Barrier against biological, chemical, and physical assaults.

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Marcrophages that activate the immune system.

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The skin or cutis covers the entire outer surface of the body. Structurally, the skin consists of two layers which differ in function, histological appearance and their embryological origin. The outer layer or epidermis is formed by an epithelium and is of ectodermal origin.

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* produce fibrous protein keratin; arise in stratum basale; these cells undergo continuous mitosis

* epithelial cells that synthesize the pigment melanin. Found in the stratum basale.

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* is the most important layer of the spidermis

* is a single row of cells

* is the closets to the basement membrane

* the desmosomes hold keratinocyte together
* one daughter cells stays in basale layer the othr daughter cell is pushed up toward the surface and become keratinized

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Thermoregulation. The integumentary system helps regulate body temperature through its tight association with the sympathetic nervous system, the division of the nervous system involved in our fight-or-flight responses. ... When the sweat evaporates from the skin surface, the body is cooled as body heat is dissipated.

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Somatic sensations that arise from stimulating the skin surface

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Skin is a barrier that serves as one of the body's first lines of defense against harmful microbes. Specialized immune cells within skin tissue help to fight invading organisms. Yet the skin hosts diverse communities of beneficial bacteria, collectively known as the skin microbiota.

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Platelets Making A Scab ☺ - Hataraku Saibou [1080p]

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together with hair, nails, and glands — composes the integumentary system. ... Stratum lucidum (from the Latin word for “clear”) is found only in the thick skin on the palms of the hands and the soles of the feet.

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3-5 layers flattened keratinocytes, apoptosis, contains protein keratohhyalin which converts tonofilaments in keratin. Lamellar granules (water repellant)

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* Function as touch receptors, associated with sensory nerve endings.
Merkel cells (shown in blue) are located in the basal epidermal layer of the skin. Merkel cells, also known as Merkel-Ranvier cells or tactile epithelial cells, are oval-shaped mechanoreceptors essential for light touch sensation and found in the skin of vertebrates.

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25- 30 layers flattened dead keratinocytes. Functions: water repellant, protect from injury and microbial invasion.

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Can be classified by their structure. All sensory receptors in the skin are the dendrites of the sensory neurons that carry info to the central nervous system. In FREE nerve endings, the dendrites are BARE; in ENCAPSULATED nerve endings, the dendrites are surrounded by a CT capsule.