Integumentary Flashcards
the most common type of sweat gland
eccrine sweat
other term for hypodermis
subcutaneous tissue
produce chemicals that are odorless when first released but quickly metabolized by bacteria which causes body odor
apocrine sweat
What stratum is absent in thin skin.
Stratum lucidum
Contains blood vessels that supply the overlying
epidermis with O2 and nutrients, remove waste products, and aid in regulating body temperature.
papillary layer
type of epithelial root sheath that has all the strata found in thin skin
external epithelial root sheath
it produces both the hair and the inner root sheath
hair matrix
Organs of the Integumentary System
Skin and Accessory Structures (Hair, Nails, Glands)
the most superficial cells slough off
stratum corneum
fibers of the reticular layer
collagen and elastic fibers
a skin that covers the lateral and proximal edges of the nail
nail fold
a thickened region of the stratum corneum beneath the free edge of the nail body
hyponychium
composed of the combined secretion of ceruminous glands and sebaceous glands
cerumen
gland that is located in the breast
mammary gland
Cells of the dermis
fibroblasts, few adipocytes, and macrophages
Contains blood vessels, sweat and sebaceous glands and pressure receptors
reticular layer
location of the nails
distal ends of the digits
part of the hair which is located above the surface of the skin
shaft
two types of sweat glands
eccrine and apocrine glands
Functions of the integumentary system
protection, sensation, excretion, temperature regulation, and vitamin D production
covers the rest of the body and is more flexible than thick skin.
thin skin
tissue layers of the dermis that is loose connective tissue
papillary layer
fibers of the dermis
Collagen, elastic, and reticular
the central axis of the hair, consist of two or three layers of cells containing soft keratin
medulla
gland that is located in the ear canal
ceruminous
it makes the cells more durable
keratin
hair is divided into?
shaft and root
contracts, pull the follicle into more perpendicular position, causes the hair to “stand on end”
arrector pili muscle
receives nutrients and excrete waste by diffusion
epidermis
cell of the epidermis that produce the pigment melanin
melanocyte
strata of the epidermis that consist of several layers of cells held together by many desmosomes
stratum spinosum
epidermis is separated from the underlying dermis by?
basement membrane
tube-like invagination of the epidermis that extends into the dermis
hair follicle
strata of the epidermis that consist of a layer of dead, transparent cells
stratum lucidum
contains no blood vessels
epidermis
it attaches the skin to underlying bone and muscle and supplies the skin with blood vessels and nerves.
subcutaneous tissue
hair papilla has ______ that provide nourishment to the cells of the matrix
blood vessels
Pain and touch receptors in the papillary layer
meissner’s corpuscles
surrounds the medulla and forms the bulk of the hair; it contains hard keratin
cortex
epithelial root sheath is divided into:
external and internal
other term for eccrine sweat glands
merocrine
it has all five epithelial strata, and the stratum corneum has many layers of cells
thick skin
cell of the epidermis that gives the epidermis its ability to resist abrasion and reduce water loss
keratinocytes
the stratum corneum of the nail fold grows onto the nail body
cuticle or eponychium
thick skin is found in what areas
areas subject to pressure or friction, such as the palms of the hands, the soles of the feet, and the fingertips
nails are consist of:
proximal nail root and distal nail body
modified eccrine sweat glands
ceruminous glands
it is where a hair develops and grows within
hair follicle
found in the axillae and genitalia and around anus
apocrine sweat
strata of the epidermis that consist of keratinocytes, which produce the cells of more superficial strata
stratum basale
responsible for a person’s fingerprint
dermal papillae in hands and sole of the feet
structure of hair where only the stratum basale is present
hair bulb
cells of the epidermis that is part of the immune system
langerhans cells
simple, coiled, tubular glands that open directly onto the surface of the skin through sweat pores
eccrine sweat
an oily, white substance rich in lipids
sebum
modified apocrine sweat glands
mammary glands
a mass of epithelial cells inside the hair bulb
hair matrix
cell of the epidermis that produce a protein mixture called keratin
keratinocytes
not part of the skin
subcutaneous tissue
keratinized stratified squamous epithelium
epidermis
the portion of the dermis that surrounds the epithelial root sheath
dermal root sheath
major glands of the skin
sebaceous glands and sweat glands
strata of the epidermis that consist of cells filled with granules of keratohyalin
stratum granulosum
thin plate consisting of layers of dead stratum corneum cells that contain a very hard type of keratin
nails
other glands
ceruminous and mammary glands
it is seen through the nail body as a whitish, crescent-shaped area at the base of the nail
lunula
other term for earwax
cerumen
small part of the nail matrix
lunula
an expanded knob at the base of the hair root
hair bulb
found everywhere on the skin except the palms, soles, lips, nipples, parts of the external genitalia, and distal segments of the fingers and toes
hair
Deepest skin layer
reticular layer
cells of the reticular layer
fibroblast, adipose, and phagocytes
cells of the subcutaneous tissue
fibroblasts, adipocytes, and macrophages
tissue layers of the dermis that is very uneven and has dermal papillae
papillary layer
It is a fibrous connective tissue
dermis
simple, coiled, tubular glands that usually open into hair follicles superficial to the opening of the sebaceous glands
apocrine sweat
Two major tissue layers of the skin
epidermis and dermis
specialized epidermal cells associated with the nerve endings responsible for detecting light touch and superficial pressure
merkel cells
Cell death occurs in this stratum
Stratum granulosum
Cells of the epidermis
keratinocytes, melanocytes, langerhans cells, and merkel cells
each strata in thin skin contains _____ layers of cells
fewer
located in the dermis, glands that produce sebum
sebaceous glands
concentric layers of hair
medulla, cortex, and cuticle
tissue layers of the dermis
papillary and reticular layer
it held the edges of the nail in place
nail groove
tissue layers of the dermis that is composed of dense irregular connective tissue
reticular layer
part of the hair which is located below the surface of the skin
root
strata of the epidermis that consist of many layers of dead squamous cells
stratum corneum
what do you call on a fingerlike projections from superior surface
dermal papillae
regions or strata of the epidermis
stratum basale
stratum spinosum
stratum granulosum
stratum lucidum
stratum corneum
contributes to skin color
melanin
hair follicle is consists of:
dermal root sheath and epithelial root sheath
dermis of the skin projects into the hair bulb as
hair papilla