Exercise 7: The Integumentary System

Front 1

Epidermis

Back 1

Avascular layer composed of 4-5 different layers

Front 2

Keratinocytes

Back 2

The most abundent epithelial cells in the epidermis and produce keratin.

Front 3

Melanocytes

Back 3

Epidermal cells that produce pigment called melanin

Front 4

Dendritic Cells

Back 4

Immunity cells of the epidermis

Front 5

Tactile (Merkel) Cells

Back 5

Responsible for touch receptors.

Front 6

Stratum basale

Back 6

The deepest layer of the epidermis composed of rapidly dividing cells and melanocytes

Front 7

Stratum spinosum

Back 7

2nd deepest layer in the epidermis composed of dividing cells and tactile cells

Front 8

Stratum granulosum

Back 8

3rd deepest layer in the epidermis composed of dying cells

Front 9

Stratum lucidum

Back 9

4th deepest layer in the epidermis composed of flattened dead keratinocytes used for protection in high impact areas

Front 10

Stratum corneum

Back 10

Outermost layer of keratinocytes consisting of about 20-30 layers of dead keratinocytes

Front 11

Dermis

Back 11

2nd layer of skin inferior to the epidermis, composed of papillary layer and reticular layer

Front 12

Dermal papilae

Back 12

Superior layer of dermis which is bumpy giving individuals their finer prints

Front 13

Reticular Layer

Back 13

Deepest skin layer composed of dense irregular connective tissue and contains many arteries and veins, sweat and sebaceous glands, and pressure receptors

Front 14

Melanin

Back 14

Gives people their browish tone

Front 15

Carotene

Back 15

Gives people their yelow-orangish tone

Front 16

Body

Back 16

The visable attached portion

Front 17

Free Edge

Back 17

Portion of the nail that frows out away from the body

Front 18

Root

Back 18

The part that is embedded in the skin and adheres to an epithelial nail bed

Front 19

Nail Folds

Back 19

Skin folds that overlap the boarders of the nail

Front 20

Eponychium

Back 20

The thick proximal nail fold commonly called the cuticle

Front 21

Nail Bed

Back 21

Extension of the stratum basale beneath the nail

Front 22

Nail Matrix

Back 22

Thickened proximal part of the nail bed containing germinal cells responsible for nail growth

Front 23

Lunule

Back 23

Proximal region of the thickened nail matrix which appears as a white crescent.

Front 24

Hair

Back 24

Consist of three different parts, the medulla, cortex, and cuticle

Front 25

Folicle Wall

Back 25

The superficial layer of hair composed of an internal and external epithealial root sheath, glassy membrane, and connective tissue root sheath

Front 26

Eccrine Glands

Back 26

Sweat glands found over the majority of the body that help us to cool down during exercise

Front 27

Apocrine Glands

Back 27

Sweat glands found in the axillary and genital areas that produce a milky protein and fat rich sweat.