INTEGUMENTARY SYSTEM

52問 • 7ヶ月前

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通報

問題一覧

Components of the Integumentary system

skin, hair, nails, glands

Functions of the Integumentary System

protection, sensation, temperature regulation, excretion, vitamin d production

How much does the skin weigh

9 lbs

2 main regions of the skin

epidermis, dermis

1st major skin region (outside)

epidermis

Composed of stratified squamous epithelium

epidermis

process in which new cells (with keratin) push old cells to surface, 40-56 days for new cells to reach surface

keratinization

outermost layer of epidermis, 20-30 layers of dead squamous cells filled with keratin, accounts for 75% of epidermal thickness, dandruff is this layer flaking off scalp

stratum corneum

forms when stratum corneum has frequent friction

callus

deepest layer of epidermis, single layer of cells, firmly attached to dermis

stratum basale

2nd major skin region, Dense connective tissue, Contains collagen and elastic fibers, Contains fibroblasts, nerve endings, smooth muscle, glands, blood vessels, and hair follicles

dermis

area where skin is most resistant to stretching, due to orientation of collagen fibers, important in scarring

cleavage lines

Layers of Dermis

papillary layer, dermal papillae, reticular layer

thin connective tissue layer that contains blood vessels

papillary layer

projections that extend up into epidermis, remove waste and help regulate body temp, ridged on hands and feet (fingerprints), pattern is genetically determined

dermal papillae

deepest layer of dermis, accounts for 80% of dermis

reticular layer

Below dermis, Foundation of skin, Attaches skin to underlying muscle and bone, Contains loose and adipose tissue, Contains ½ of body’s fat

Hypodermis

Body fat for females

20-23%

Body fat for males

13-25%

Skin Color and Variations is Determined by

pigments, genetics, blood circulation, thickness of stratum corneum

All races have same number of melanocytes

True

produced by melanocytes, ranges from yellow to reddish-brown to black, responsible for hair and eye color, provides protection against UV light, amount produced determined by genetics and UV light,freckles are accumulation of melanin, albinism is absence of melanin

melanin

yellow-orange pigment found in plants, accumulates in stratum corneum

carotene

gives pinkish-red color, found in red blood cells

hemoglobin

fever, hypertension, inflammation, allergies

redness

anemia or low blood pressure

pallor

liver disorder (yellow)

jaundice

Addison’s disease (adrenal gland disease)

bronzing

broken blood vessels

bruising

flexible strands of keratinized cells

hair

below skin (scalp)

root

base of root, where hair is produced

hair bulb

group of cells that surround root and bulb, gives hair different shapes

hair follicle

Hair is produced in?

hair bulb

Scalp hair grows for _ years and rests for _ year

3, 1

Eyelashes grow for __ days and rest for ___ days

30, 105

We lose about __ scalp hairs/day

Grey hair is the loss or fading of?

melanin

smooth muscle that surrounds each hair follicle, contracts and hair stands on end(goose bumps)

arrector pili

Glands of the skin

sebaceous glands, eccrine sweat glands, apocrine sweat glands

connected to hair follicle

sebaceous glands

oily substance that lubricates hair and skin to prevent drying

sebum

all over body and open into sweat pores, water and salt secretions

eccrine sweat glands

open into hair follicle, only in armpits and genitalia, thick, rich secretions, become active during puberty and cause body odor

apocrine sweat glands

thin plate with layers of dead stratum corneum cells with hard keratin

nails

visual part

nail body

covered by skin

nail root

stratum corneum that extends into nail body

cuticle

continuation of nail root, gives rises to most of nail

nail matrix

attaches to nail and is distal to nail matrix

nail bed

part of nail matrix, whitish, crescent shaped area, base of nail

lunula

Body temp. should be ___°F

98.6

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問題一覧

Components of the Integumentary system

skin, hair, nails, glands

Functions of the Integumentary System

protection, sensation, temperature regulation, excretion, vitamin d production

How much does the skin weigh

9 lbs

2 main regions of the skin

epidermis, dermis

1st major skin region (outside)

epidermis

Composed of stratified squamous epithelium

epidermis

process in which new cells (with keratin) push old cells to surface, 40-56 days for new cells to reach surface

keratinization

outermost layer of epidermis, 20-30 layers of dead squamous cells filled with keratin, accounts for 75% of epidermal thickness, dandruff is this layer flaking off scalp

stratum corneum

forms when stratum corneum has frequent friction

callus

deepest layer of epidermis, single layer of cells, firmly attached to dermis

stratum basale

2nd major skin region, Dense connective tissue, Contains collagen and elastic fibers, Contains fibroblasts, nerve endings, smooth muscle, glands, blood vessels, and hair follicles

dermis

area where skin is most resistant to stretching, due to orientation of collagen fibers, important in scarring

cleavage lines

Layers of Dermis

papillary layer, dermal papillae, reticular layer

thin connective tissue layer that contains blood vessels

papillary layer

projections that extend up into epidermis, remove waste and help regulate body temp, ridged on hands and feet (fingerprints), pattern is genetically determined

dermal papillae

deepest layer of dermis, accounts for 80% of dermis

reticular layer

Below dermis, Foundation of skin, Attaches skin to underlying muscle and bone, Contains loose and adipose tissue, Contains ½ of body’s fat

Hypodermis

Body fat for females

20-23%

Body fat for males

13-25%

Skin Color and Variations is Determined by

pigments, genetics, blood circulation, thickness of stratum corneum

All races have same number of melanocytes

True

melanin

yellow-orange pigment found in plants, accumulates in stratum corneum

carotene

gives pinkish-red color, found in red blood cells

hemoglobin

fever, hypertension, inflammation, allergies

redness

anemia or low blood pressure

pallor

liver disorder (yellow)

jaundice

Addison’s disease (adrenal gland disease)

bronzing

broken blood vessels

bruising

flexible strands of keratinized cells

hair

below skin (scalp)

root

base of root, where hair is produced

hair bulb

group of cells that surround root and bulb, gives hair different shapes

hair follicle

Hair is produced in?

hair bulb

Scalp hair grows for _ years and rests for _ year

3, 1

Eyelashes grow for __ days and rest for ___ days

30, 105

We lose about __ scalp hairs/day

Grey hair is the loss or fading of?

melanin

smooth muscle that surrounds each hair follicle, contracts and hair stands on end(goose bumps)

arrector pili

Glands of the skin

sebaceous glands, eccrine sweat glands, apocrine sweat glands

connected to hair follicle

sebaceous glands

oily substance that lubricates hair and skin to prevent drying

sebum

all over body and open into sweat pores, water and salt secretions

eccrine sweat glands

open into hair follicle, only in armpits and genitalia, thick, rich secretions, become active during puberty and cause body odor

apocrine sweat glands

thin plate with layers of dead stratum corneum cells with hard keratin

nails

visual part

nail body

covered by skin

nail root

stratum corneum that extends into nail body

cuticle

continuation of nail root, gives rises to most of nail

nail matrix

attaches to nail and is distal to nail matrix

nail bed

part of nail matrix, whitish, crescent shaped area, base of nail

lunula

Body temp. should be ___°F

98.6