Unit 2 Integumentary System Key Terms

Question 1

homeostasis

Answer 1

the human body keeping a constant internal temperature

Question 2

epidermis

Answer 2

the surface layer of the skin

Question 3

dermis

Answer 3

inner layer, composed largely of dense connective tissue, thicker than the epidermis

Question 4

hypodermis/subcutaneous layer

Answer 4

beneath dermis, not a true layer of skin

Question 5

5 layers - stratum corneum

Answer 5

dead cell layer

Question 6

5 layers - stratum lucidum

Answer 6

dying; only on palms and feet

Question 7

5 layers - stratum granulosum

Answer 7

mature cells

Question 8

5 layers - stratum spinosum

Answer 8

maturing cells

Question 9

5 layers - stratum basale

Answer 9

innermost

Question 10

melanocytes

Answer 10

specialized cells in the epidermis, produces melanin which provides skin color

Question 11

hair shaft

Answer 11

formed in 3 layers

Question 12

hair follicle

Answer 12

part of skin which grows a hair by packing old cells together

Question 13

nerve fiber

Answer 13

sensory receptors of the skin

Question 14

sebaceous gland

Answer 14

microscopic exocrine glands in the skin that secrete an oily matter (sebum) into hair follicles to lubricate the skin and hair

Question 15

arrector pili muscle

Answer 15

small muscles attached to hair follicles in mammals

Question 16

hair root

Answer 16

assists in the absorption of water and minerals

Question 17

sweat gland duct

Answer 17

the part of the sweat gland that carries sweat from the gland to the surface of the skin

Question 18

sweat pore

Answer 18

an opening of a sweat gland to the surface of the skin

Question 19

artery

Answer 19

delivers oxygen-rich blood from the heart to tissues of the skin

Question 20

vein

Answer 20

carries oxygen-poor blood to the heart from tissues of the skin