A&p Pre-Lab Exercise 6-1

Front 1

Epidermis

Back 1

Top layer of the skin; keratinized stratified squamous epithilium

Front 2

Keratinocyte

Back 2

Dead cells; synthesize keratin

Front 3

Melanocyte

Back 3

Occur only on the stratum basale; synthesize the brown to black pigment melanin

Front 4

Stratum Corneum

Back 4

Superficial layer composed of dead cells called keratinocytes

Front 5

Stratum Lucidum

Back 5

Single layer of translucent, dead cells found only in the palms and the soles of feet

Front 6

Stratum Granulosum

Back 6

Superficial cells are dead, but the deeper cells are alive

Front 7

Stratum Spinosum

Back 7

First layer with actively metabolizing cells; contains pigment melanin

Front 8

Stratum Basale

Back 8

Deepest layer contains a single row of actively dividing cells

Front 9

Dermis

Back 9

Second layer deep in the skin; connective tissue layer

Front 10

Dermal Papillae

Back 10

Fingerlike projections that project into the epidermis

Front 11

Pacinian (lamellated) Corpuscle

Back 11

Pressure receptors within the reticular layer

Front 12

Meissner's (tactile) Corpuscle

Back 12

Sensory receptors in that skin that detect fine touch

Front 13

Hypodermis

Back 13

Third layer deep in the skin beneath the dermis

Front 14

Sweat Gland

Back 14

Exocrine gland that secretes sweat through a small pore

Front 15

Sebaceous Gland

Back 15

Exocrine gland that secretes sebum (oil) into a hair follicle

Front 16

Hair Follicle

Back 16

An epithelial tissue-lined sheath surrounding the hair bulb

Front 17

Nails

Back 17

Composed primarily of dead, keratinized cells

Front 18

Arrector Pili Muscle

Back 18

Bundle of smooth muscles extending from dermal collagen fibers to the connective tissue root sheath of the follicle