Topic 3: Integumentary System

The average adult body has ____ square feet of skin.

21.5

integumentary system includes the ___, ______, ______, _____, and ________.

skin, hair, nails, sweat glands, and sebaceous glands

The epidermis is made up of ____ cells, a flat, scaly layer of cells.

squamous epithelium

The top sublayer of epidermis is called ____.

stratum corneum

The bottom layer of the epidermis is called ______. This is where new cells are produced and pushed to the stratum corneum. It is a nonvascular layer of skin.

stratum germinativum

Collagen is a protein substance that is very tough, yet flexible. When collagen fibers stretch they form _____________ (aka stretch marks)

striae

The ______ layer is the layer between the dermis and the body's inner organs.

subcutaneous layer

What is the layer below the dermis?

subcutaneous layer

What layer of skin contains fatty tissue?

subcutaneous layer or hypodermis

Which glands are found almost everywhere on the body surface?

sweat

hidr/o

sweat

Hair serves to _____ and ______ the areas it covers.

cushion and protect

The excretion of sweat is called ____.

diaphoresis

xer/o

dry

xeroderma

dryness of skin

Small sweat glands found on many places of the body that excrete colorless fluid that keeps the body at a constant temp are called ____________ glands.

eccrine

The skin has 3 main layers: the _____, _____, and _____.

epidermis dermis subcutaneous or hypodermis

Term for the removal of hair from the root

epilation

adiposis

excessive accumulation of body fat

What are the glands that secrete outward toward the surface of the body through ducts?

exocrine

steat/o

fat

adip/o

fatty

lip/o

fatty

ichty/o

fish, scaly

myc/o

fungus

pil/o

hair

trich/o

hair

Hair grows upward from the root through the __________.

hair follicle

In regards to hair: the ________ protrudes from the skin and the ________ lies beneath the surface of the skin.

hair shaft hair root

kerat/o

horny tissue

dermatitis

inflammation in the skin

steatitis

inflammation of fatty tissue

disease of the hair

trichopathy

Secretions exit the skin through _____.

pores

Sweat is composed of ____ and _____.

water sodium chloride

xanth/o

yellow

hidrosis

production and excretion of sweat

Hair shaft is composed of outer layers of ______ cells filled with inner layers of soft and hard ________.

scaly keratin

What glands located in the dermins secrete an oily substance that lubricates and protects the skin (aka skin barrier)

sebaceous

What oily substance is secrete to lubricate and protect the skin? (skin barrier)

sebum

seb/o

sebum

What determines the texture/shape of hair?

shape of the follicle

What is the largest organ in the body?

skin

cutan/o

skin

dermat/o

skin

pilocystic

skin cyst with hair

keratosis

skin lesion covered by a horny layer of tissue

melan/o

black, dark

______ gland are specialized glands in the surface of the ear that secrete cerumen, a waxy substance that lubricates the ear.

ceruminous

The dermis contains connective tissue that is primarily composed of ___________ fibers that form a strong elastic network.

collagen

What is the waxy substance that protects and lubricates the ear?

Cerumen

True or false: All parts of the body's skin contain all of the sublayers of epidermis.

False

What does the integumentary system do for the body?

covers and protects regulate temp excrete waste Synthesize vit D Sense pain and sensation

What is keratin?

a waterproof barrier that keeps moisture in and microorganisms out

The subcutaneous layer consists of ________ tissue and some layers of fibrous tissue.

adipose

mycosis

any skin condition caused by fungus

Nails are plates made of hard _______ that cover the dorsal surface of the distal bone of fingers and toes.

keratin

At the base of most nails, there's a whitish half moon that is called the ______.

lunula

rubella

measles

Hair color is determined by the presence of _____________.

melanin

Cells that produce melanin are called __________.

melanocytes

Gray hair occurs when?

melanocytes stop producing melanin

onych/o

nail

incision into the nail

onychotomy

The epidermis is the ________ layer of skin and ranges from ______ to ____ of an inch thick. It consists of several _____.

outer 1/20, 1/200 strata

infection on skin from insect

pediculosis