ch5 integumentary system and body membranes Flashcards
Body membranes
epithelial membranes and connective tissue membranes.
Epithelial membrane types
cutaneous membrane ( skin)
serous membranes, and
mucous membranes.
two types of serous membranes:
not open
parietal, which lines the walls of body cavities on the inside
visceral, which covers the organs found in body cavities.(its within the parietal)
pleura have parietal and visceral layers..
in the thoracic cavity and cover the lungs.
peritoneum has parietal and visceral layers…
which line the walls of the abdominal cavity
Mucous membranes
line the body surfaces that open directly to the exterior. These produce mucus, which is a thick secretion that keeps the membranes soft and moist.
nose mouth vagina
cilia traps, protects, and projects to get rid of foriegn material
Connective tissue membranes
lubricant called synovial fluid. Examples of these connective tissues are synovial membranes in spaces between joints and in the lining of bursal sacs. kneecap/patella
The skin has two primary layers:
the epidermis is the outermost and thinnest primary layer of the skin.
and the dermis is composed largely of connective tissue.
stratum germinativum
growth of new skin where mitosis occurs
is the innermost layer of cells that continually reproduce, pushing new cells toward the surface
deepest epidermal layer is responsible for
production of the pigment, which gives color to the skin.
NOT subcutaneous tissue
dermis
is composed largely of connective tissue.
also contains nerve endings, muscle fibers, hair follicles, sweat and sebaceous glands, and many blood vessels.
upper papillary layer of the dermis
fingerprinting and improves grip for tool use and walking.
Deeper reticular layers of the dermis
network of tough collagenous, and stretchable elastic fibers. it decreases with age and contributes to wrinkle formation.
accessory structure of the skin
hair, nails, receptors of the skin
lanugo
soft hair of a fetus and newborn is called
arrector pili
is a specialized smooth muscle that produces goose bumps and causes hair to stand up straight
Meissner corpuscle
allows the skin to be capable of detecting light touch
Pacini corpuscle
allows the detection of pressure.
nails
produced by epidermal cells
visible part is called the nail body
crescent-shaped is the lunula.
The nailbed may change color with a change in blood flow.
two types of skin glands:
the sweat or sudoriferous glands and the sebaceous glands.
Sweat glands are subsequently broken into
eccrine and apocrine sweat glands.
eccrine sweat glands
produce perspiration and assists the body in heat regulation.
Apocrine sweat glands
in the axilla and genitalia.
thicker secretion
breakdown by the skin bacteria that produces odor.
Sebaceous glands
secrete oil or sebum for the hair and skin.
The skin has three main functions.
protection first line of defense against infection by microbes, ultraviolet rays from the sun, harmful chemicals, and cuts and tear.
temperature regulation.3,000 calories of body heat per day.
skin is an enormous sense organ. environment.
burns
The body is divided into 11 areas of 9% each.
first-degree burn/partial-thickness,only the surface layers of the epidermis.
second-degree burn partial-thickness burn and involves the deep epidermal layers and always causes injury to the upper layers of the dermis.
third-degree full-thickness burn complete destruction of the epidermis and dermis. may involve muscle and bone risk of infection is increased
