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Griffin Tech A&P AHS 101 CH 5

Terms

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The skin its appendages, blood vessels, nerves, and sensory organs make up what system?
Integumentary
Integument means?
Covering
The outer most layer portion of the skin is called strata or?
epidermis
True skin?
dermis
Composed of only epithelial cells and contains no blood vessels?
Epidermis
Has framework of connective tissue and contains many blood vessels nerve endings, and glands?
Dermis (true skin)
This layer of skin is nourished by capillaries not blood vessels?
Epidermis
New epidermis cells are produced in the deepest layer which is closest to the?
Dermis
The cells are constantly dividing into daughter cells which are then pushed upward toward the surface of the skin?
Stratum Basale or stratum germinativum
Serves to thicken and protect skin?
Keratin
The uppermost layer of the epidermus is known as?
Stratum Corneum
Contain flat cells filled with keratin and horny?
Stratum Corneum
Also known as the protective layer?
Stratum Corneum
The term meaning to cells of surface are constantly being lost and replaced?
exfoliation
Located between the stratum corneum and stratum basale?
Stratum epithelium
Produced in the deepest layer of the epidermis also referred to as pigment?
Melanin
Cells that produce melanin?
melanocytes
Irregular patches of melanin?
Freckles
Thick layers of skin are located where on the body?
soles of feet, palms of hands
Delicate layers of skin are located where on the body?
eyelids
Portions of the dermis that extend upward into the epidermis?
dermal papillae
Finger prints and footprints are an examples of ?
dermal papillae
The superficial layer of the skin?
epidermis
The deep layer of the skin?
dermis
Referred to as the hypodermis or superficial fascia?
Subcutaneous Layer
This layer connects the skin to the surface muscles?
Subcutaneous Layer
This layer consists of loose connective tissue (aerolar) and adipose (fatty)?
Subcutaneous Layer
The largest organ in the body weighing about 4kg is the?
Skin
Thick skin is about _____mm deep?
1 mm
Thin skin is about ______mm
deep?
0.1 mm
Layer of skinnot found in thin skin is?
Stratum licidum
Both the stratum ________and stratum _________ make skin resistant to abrasions?
corneum and lucidum
Characterized by epidermis ridges and numerous sweat glands, but lacks hair and sebaceous glands?
Thick skin
Coverd with hair that helps prevent heat loss?
Thin skin
Contains sebaceous glands?
Thin skin
Blood vessels that supply O & help to regulate body temp run through the?
Subcutaneous (superficial fascia or hypodermis)
Layer of skin that are rich in nerves and nerve endings?
Subcutaneous (superficial fascia or hypodermis)
What is the composition of the subcutaneous layer?
Contains aerolar and adipose tissue
Accesory of the skin that is sac-like in structure and secretes sebum?
sebaceous glands
Lubricates the skin and hair to prevent drying?
sebaceous glands
The ducts of the sebaceous glands open into the?
hair follicle
Babies are born with a covering that resembles cream cheese known as?
vernix caseosa(cheesy varnish)
Modified sebaceous glands that are associated with eyelashes and lubricates the eyes?
meibomian glands
Sebaceous glands that become infected result in?
Pimples
When a sebaceous gland becomes blocked and increases in size?
sabaceous cyst
Coiled tubelike structures located in the dermis and the subcutaneous tissue?
Sudoriferous glands
Eccrine type sweat glands?
Sudoriferous glands
Helps in the cooling of the body?
Sudoriferous glands
Each gland has an secretory portion and an excretory tube that extends to the surface and opens to a pore?
Sudoriferous glands
Present in the armpits and groin and become active at puberty ?
apocrine sweat glands
Modified sweat gland in ear canals?
ceruminous glands
Modified sweat glands that secrete cerumen?
ceruminous glands
Modified sweat glands located at the edges of the eylids?
Ciliary glands
Modified sweat glands located in the breast or mammary?
mammary glands
Each hair developes from living cells located in a bulb at the base of the ?
hair follicle
Melonocytes add pigment to the developing ______?
hair
The part of the hair that projects above the surface is known as the?
shaft
The portion of the hair that is below the skin is known as the ?
root
Attached to the follicle is a thin band of involuntary muscle known as?
arrector pili (goosebumps)
(hair raiser)
Each hair developes within a sheath called?
Hair follicle
Made up of hard keratin produced cells that originate in the outer layer of the statum corneum?
Nails
Growth region of the nails?
nail matrix
Located under the proximal region of the nail?
nail root
The ______rests on the nail bed?
nail plate
An extension of the stratum corneum which seals the space between the nail plate and the skin above the root?
cuticle
The four major functions of the skin?
1. Protection against infection
2. Protection against dehydration
3. Regulating body temp
4. collection of sensory info
Forms a tight intelocking patterm that is resistant to penetration?
stratum corneum
Keratin and sebaceous glands help to prevent?
dehydration
In cold conditions vessels in the skin _______to reduce the flow of blood to the surface and diminish heat loss?
Narrow (constricts)
In warm conditions vessels in the skin _______ to increase the flow of blood to the surface to dissipate heat?
Widen (dilate)
The evaporation of perspiration from the ________glands help to draw heat away from the skin?
Sudoriferous
Regarded as one of the chief sensory organs of the body?
Skin
Contains free nerve endings to detect sensory information?
skin
Touch receptors are known as?
Meisser corpuscle
Deep pressure receptors are known as?
Pacinian corpuscle
Water and electrolytes are excreted through?
Sudoriferous glands
Vitamin D needed for development and maintenance of bone tissue is manufactured in the?
Skin
Type of medication administration that delivers a slow constant amount of medications into the bloodstream via the skin?
Transdermal Patches
Uses mild electrical currents to move ionic drugs through the skin?
iontophoresis (like charges repel)
Skin color is based on:
1 amt of pigment in epidermis
2 qty of blood in vessels
3 composition of blood
3a O 3b hemoglobin
3c presence of bile, silver concentration or other chem.
True
________in skin helps to protect against UV rays?
Melanin
The main pigment of the skin, hair, middle coat of the eyeball, iris, and certain tumors?
Melanin
Diffuse spots of pigmentation are characteristics of _______ or lack of pigment?
albinism
A pigment in the skin obtained from carrots and other orange or yellow vegetables?
carotene
_________is stored in the fatty tissue of the skin (yellow/orange pigment)?
Carotene
Gives blood its colour?
hemoglobin
Wrinkles are caused by a loss of fat and ______in the underlying tissues?
Collagen
When the dermis becomes thin and loses its elasticity?
parchment skin
Three most common forms of skin cancer?
Basal cell carcinoma
squamous cell caricinoma
malignant melanoma
Basale cell carcinoma involves the?
Stratum basale (cells) in the epidermis
True/False
Squamous cell carcinoma involves the epithelium tissue/cells?
True
True/False
Malignant melanoma involves the melonocytes in the deepest layer of the epidermis?
True
Derm/o
skin
corne/o
horney
ap/o
separation from, derivation from
pil/o
hair
alb/i
white, without pigment
Produces new cells and prduces melanin?
Stratum basale/stratum germinativum
Surface layer of dead cells?
stratum corneum
Type of sudoriferous gland that vents directly to the surface?
Eccrine gland
_________glands excrete through hair follicles?
Apocrine
This layer of skin contains large amounts of?
Keratin
The epidermis is_________to the dermis?
deep
The dermis is called true skin or?
Corium layer
The deepest layer of the dermis that extends into the epidermis?
dermal papillae

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