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17 Cards in this Set
- Front
- Back
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1. Stratum Corneum |
The outermost surface of the skin, a layer of dead skin cells. Flat, scaly, keratinized (hardened) epithelial cells. |
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2. Stratum Germinativum |
Cells are born in this layer. They get pushed up, die, and then fill up with a protein called keratin. |
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3. Sebaceous Gland |
Secrete sebum, or oil, to keep the skin from drying out. The sebum also helps destroy pathogens on the skin's surface. They are usually found in hair covered areas, where they are connected to hair follicles. |
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4. Matrix |
Around the papilla, a collection of epithelial cells often interspersed with pigment producing cells. The matrix is one of the fastest growing cell populations in the body. The matrix wraps around the papilla, and has a small connection to the surrounding tissue. It also provides access for capillaries. |
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5a. Inner Root Sheath |
The inner root sheath is made up of three layers: 1. cuticle, 2. Huxley's layer, 3. Henle's layer. |
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5b. Outer Root Sheath |
Encloses the inner root sheath and hair shaft. It is continuous with the basal layer. |
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6. Papilla |
Uppermost layer of the dermis, helps increase the surface area between the dermis and epidermis. The increase in surface area prevents the dermal and epidermal layers from separating and strengthens the junction between them. |
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7. Sweat Gland |
Small tubular structures of the skin that produce sweat. The two types differ in their structure, function, secretory product, and mechanism of excretion. |
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8. Nerve |
A whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord, and impulses from these to the muscles and organs. |
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9. Adipose Tissue |
Connective tissue in which fat is stored and which has the cells distended by droplets of fat |
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10. Hypodermis or Subcutaneous Fascia |
Innermost and thickest layer of the skin. It invaginates into the dermis and is attached to the latter, immediately above it, by collagen and elastin fibres. It is essentially composed of a type of cells specialised in accumulating and storing fats, known as adipocytes. These cells are grouped together in lobules separated by connective tissue . |
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11. Dermis or Corium |
The layer inferior to the epidermis, thicker than the dermis. Layer of dense, irregular, connective tissue, it is considered the "true skin." |
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12. Dermal Papilla |
The superficial projections of the dermis (corium) that interdigitate with recesses in the overlying epidermis; they contain vascular loops and specialized nerve endings and are arranged in ridge like lines best developed in the hand and foot. |
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13. Capillaries |
A small blood vessel that is part of the network of the small arteries and small veins, or an extremely thin tube through which nothing thicker than a human hair can pass. |
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14. Arrector Pili Muscle |
Small muscles attached to hair follicles in mammals. Contraction of these muscles causes the hairs to stand on end - known also as goose bumps. |
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15. Motor Nerve |
A nerve carrying impulses from the brain or spinal cord to a muscle or gland. |
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16. Shaft |
The non-growing portion of a hair that protrudes from the skin, from the follicle. |
