Chapter 12 Skin The Integumentary System A&P Flashcards
is made up of the skin and its related structures, performs important functions in maintaining the health of the body
integumentary system
forms the protective outer covering the external surfaces of the entire body
skin
secrete sebum (oil) that lubricates the skin and discourages the growth of bacteria on the skin
sebaceous glands
help regulate body temperature and water content by secreting sweat.
sudoriferous glands
helps control the loss of body heat
hair
protects the dorsal surface of the last bone of each toe and finger
nails
what are the three layers of the skin
epidermis, dermis, and subcutaneous
means pertaining to the skin
cutaneous
is the outermost layer of the skin, is made up of several specialized epithelial tissues
epidermis
form a protective covering for all of the internal and external surfaces of the body
epithelial tissues
forms the upper layer of the epidermis. consists of flat, scaly cells that are continuously shed
squamous epithelial tissue
is the lowest layer of the epidermis. here that new cells are produced and then pushed upward
basal layer
is a fibrous, water-repellent protein. is a primary component of the epidermis
keratin
are special cells that are also found in the basal layer. produce and contain a dark brown to black pigment known as melanin
melanocytes
is the pigment that determines the color of the skin, which depends upon the type and amount of this pigment present
melanin
refers to light that is beyond the visible spectrum at the violet end. some help the skin produce vitamin D, others damage the skin
ultraviolet
also known as the corium, is the thick layer of living tissue directly below the epidermis
dermis
in the dermis are sensory receptors for stimuli such as touch, temperature, pain, and pressure
sensory nerve endings
means glue, is a tough, yet flexible, fibrous protein material found in the skin
collagen
found in the connective tissue of the dermis, respond to injury, infection, or allergy by producing and releasing substances, including heparin and histamine
mast cells
which is released in response to an injury, is an anticoagulant
heparin
prevents blood clotting
heparin
is released in response to allergens, causes the signs of an allergic response, including itching and increased mucus secretion
histamine
is located just below the layers of the skin and connects the skin to the surface muscle
subcutaneous layer
layer is made up of loose connective tissue fat
adipose tissue
means fat
adipose
is a term used to describe deposits of dimpled fat around the buttocks and thighs.
cellulite
also known as fat cells, are predominant in the subcutaneous layer where they manufacture and store large quantities of fat
lipocytes
are located in the dermis layer of the skin and closely associated with hair follicles
sebaceous glands
is an oily substance that is released through ducts opening into the hair follicles
sebum
modified sebaceous glands, are sometimes classified with the integumentary system
mammary glands
also known as sudoriferous glands, are tiny, coiled glands found on almost all body surfaces
sweat glands
are the opening on the surface of the skin that act as the ducts of the sweat glands
pores
commonly known as sweat, is secreted by sweat glands and is made up of 99% water plus some salt and metabolic waste products
perspiration