Anatomy Ch 5 integumentary system

laurabockoff's version from 2016-10-21 00:54

Section 1

Question Answer
Integumentary SystemOrgan system that protects the body from various kinds of damage. The system is the skin and its appendages
Integumentmeans body covering; contains many accessory structures
Epidermisthe thinner, outer region of the skin. Made up of stratified squamous epithelium
Dermismade up of dense irregular and loose connective tissue. Very thick and located under the epidermis
Subcutaneous tissueMade up of Adipose tissue and located below the dermis

Section 2

Question Answer
Stratum basaledeepest of the epidermal layers. Are where the youngest keratinocytes are located. It is constantly dividing
Stratum Spinosumseveral layers thick. Keratinocytes of this layer are flattened. Contains a high amount of Langerhans' cells
Stratum granulosumConsists of 3-5 cell layers. Cells accumulate Keratin and become waterproof. Cells "toughen up" this layer
Stratum lucidum (clear layer)appears as a thin, translucent bond. Consists of a few rows of clear, flat, dead Keratinicyetes
Stratum Corneuma broad zone of 20-30 cell layers thick. Protects the skin against abrasion and penetration. Provides a durable overcoat to protect the other skin cells

Section 3

Question Answer
MelaninPigment is responsible for the tanning of skin exposed to sunlight
Melanocytesspecialized cells that secrete melanin and protects the skin from UV rays of sun. Causes the skin to darken and freckles to appear
Keratinocytesan epidermal cell that produces Keratin which is a fibrous protein that gives the epidermis its protective properties
Pallorwhen parts of the skin turn pale in color
Erythemaalso known as redness; occurs when the skin turns reddish

Section 4

Question Answer
CaroteneAn orange pigment found in carrots. Accumulates in the Stratum Corneum
Hemoglobinfound in blood cells (carries oxygen). Visible in the skin of caucasian people. Gives a pinkish hue color to skin
Bruisesreveals where blood has escaped from circulation and clotted beneath the skin
Dermal papillaeFinger-like protections into the epidermis that causes ridges and concentric circles on the skin surface
Sebaceous Glandsfound all over the body except on the palms and soles. Secretes sebum (exocrine glands)
Sebum an oily substance made up of lipids and cell fragments that softens and lubricates hair and skin

Section 5

Question Answer
Eccrine glandsglands that secretes sweat onto surface of the skin. Helps to regulate body temperature
Apocrine glandsfound in the axilary and anogenital areas. Contains same content as sweat; sometimes has a milky, yellowish appearance.
rootpart of hair that is embedded in the hair follicle
shaftthe externally observable part of a hair
hair folliclesheath formed of both epithelial and connective tissues that surrounds the root of the hair
arrector piliTiny muscles attached to hair follicles that pull the hair upright during fright or cold

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