front 1 Protection from water, air, infection, chemicals, UV radiation Sensations such as pressure, heat, cold, and pain Temperature regulation Excretion of water through sweat Production of vitamin D | back 1 Functions of the skin |
front 2 top layer of the skin composed of stratified squamous epithelial tissue | back 2 Epidermis |
front 3 Layer of dead cells 20-30 thick. Thick, keratinized cells protect the deeper layers. Regularly shed from the body. | back 3 Stratum Corneum |
front 4 a thin layer of translucent cells only found in thick skin of the
palms | back 4 Stratum Lucidum |
front 5 Cells here begin to flatten and disintegrate. Accumulate keratin granules, responsible for water-proofing the skin. | back 5 Stratum granulosum |
front 6 “Spiny layer”. Named for the irregular shape of the cells. Several cells thick. Contains pre-keratin filaments. | back 6 Stratum spinosum |
front 7 Constantly dividing and pushing up cells into the next layer. | back 7 Stratum Basale |
front 8 spider-shaped epithelial cells found in the bottom 2 layers of the epidermis | back 8 Melanocytes |
front 9 a pigment that is absorbed by nearby epidermal cells, melanocytes produce this pigment. protects the skin against harmful UV rays. | back 9 Melanin |
front 10 when UV radiation mutates a skin cell's DNA, the. cells begin to divide uncontrollably | back 10 Skin cancer |
front 11 Uncontrolled division of melanocytes | back 11 Melanoma |
front 12 uncontrolled division of cells in the stratum basale layer | back 12 Basal cell carcinoma |
front 13 uncontrolled division of cells in the stratum spinosum layer | back 13 Squamous cell carcinoma |
front 14 composed of dense irregular connective tissue contains nerves, blood vessels, sweat glands, and hair follicles | back 14 dermis |
front 15 boundary between the epidermis and. the dermis is a wavy layer | back 15 dermal papillae |
front 16 dermal papillae is the cause of your ____ | back 16 fingerprints or epidermal ridges |
front 17 made of loose connective tissue | back 17 papillary layer |
front 18 made of bundles of collagen fibers | back 18 reticular layer |
front 19 the arrangement of the collagen fibers cause ____ | back 19 lines of cleavage/tension |
front 20 how can blood flow change in the dermis change? | back 20 During exercise, the blood vessels in the dermis swell causing skin to appear red. This allows heat from the blood to dissipate, cooling the body. When blood supply to the skin is restricted for a prolonged time, decubitus ulcers (bedsores) can form. |
front 21 known as the subcutaneous layer compose of loose, fatty connective tissue that connects the skin to muscle or bone insulates and stores nutrients | back 21 hypodermis |
front 22 sweat glands | back 22 sudoriferous gland |
front 23 oil gland produce sebum holocrine glands lubricates skin and hair, kills bacteria | back 23 Sebaceous gland |
front 24 Merocrine sweat glands that are abundant and often found on the palms, soles of feet, and forehead sweat glands are long tubes that open into pores on the surface of the skin. | back 24 Eccrine |
front 25 found almost exclusively in the armpit and genital areas bacteria begin to break down fat & proteins causing body odor. | back 25 Apocrine |
front 26 What is the function of hair? | back 26 head hair keeps in heat and protects us from the sun body hair alerts us to insects eyelashes protect the eyes nose hair prevents the entry of foreign objects |
front 27 part of the hair that sticks out of the skin | back 27 hair shaft |
front 28 The hair shaft is protected by the outmost layer called ____ | back 28 cuticle |
front 29 hair cells divide within the follicle in a region called ____ | back 29 hair bulb |
front 30 attach to the hair shaft to make hair "stand on end" | back 30 arrector pili |
front 31 produces heavily keratinized cells | back 31 nail matrix |
front 32 the nail is protected on ____ ____ by nail _____ | back 32 three sides; folds |
front 33 whiter due to thickness of nail | back 33 Lunula |
front 34 provides a protective seal for the nail matrix. | back 34 eponychium |