How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Skin and Body Membranes
(Covering) - Protects, covers, and lines body cavities.
(Support) - Protects, binds, and supports. Cells in a matrix.
(Control) - Communication, nervous, and neuroglia.
(movement) - Generates movement and heat.
cells that support and nourish neurons
gland that releases its secretions directly into the bloodstream
gland that releases its secretions through tubelike structures called ducts
cells that make fibers.
Tough; Like a rope.
Flexible; Like a rubber band.
simple squamous epithelium
One cell layer thick of flattened cells
stratified squamous epithelium
More than one cell layer thick
simple cuboidal epithelium
One cell layer thick
simple columnar epithelium
one cell layer thick
areolar connective tissue
has fiberblasts, collagen, and elastic fibers
dense regular connective tissue
Collagen fibers that run in the same direction (makes tendons and ligaments)
dense irregular connect tissue
fibers running in different directions
chandracyte in lacunae; ground substance in matrix.
has hyaline cartilage; found between vertabrae; made with collagen fibers.
Similar to hyaline cartilage but contains elastic fibers. Found in the external ear.
osteocytes in the lacuna; collagen and calcium salts.
connective tissue; red blood cells, white blood cells, and liquid matrix (plasma)
Have striations; voluntary movements; and found in muscles
no striations; involuntary; no intercalated discs; and found in internal organs
have striations; involuntary; and intercalated discs
cell that carries messages throughout the nervous system
cells that support and nourish neurons
closed cavity; made of connective tissue and epithelium
joints; made of only connective tissue
skin; made of connective tissue and epithelium
open cavities outside the body; made of connective tissue and epithelium
instinctive; relating to the internal organs
pertaining to the walls of a cavity
(digestive organs) Parietal peritoneum lines cavities; visceral peritoneum lines surface of digestive organs
(Lungs) Parietal pleura lines cavities; visceral pleura on surface of lungs
(heart) parietal pericardium lines cavities; visceral pericardium lines surface of heart
Top, outer layer of skin; avascular ( no blood vessels)
Middle layer of skin
(subcutaneous layer) Layer of loose connective tissue below the dermis that binds the dermis to the body.
five layers of thick skin (from the inside out)
stratum corneum, stratum lucidium, stratum granulosm, stratum spinosum, and stratum basale
distinguish between the papillary and reticular layers
papillary is 20% and superficial; reticular is 80% and deep
skin color; tanning
(fingerprints); peg-like projections on the superior surface that indent the overlying epidermis
superficial; sense motion of objects that lightly touch the skin
smooth muscle that surrounds each hair follicle; contraction may cause goose bumps
oily secretions from sebacceous glands
receptors in skin that respond to pressure and vibrations; deep reticular layer
white crescent on fingernail (half moon)
secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis
fine hair covering entire fetus before birth
a soft yellow wax secreted by glands in the ear canal
found all over body; produces sweat
apocrine sudoriferous glands
milky secretion; odorless and found in groin and armpit
1st degree burn
only epidermis damaged, red and swollen, and no blisters
2nd degree burns
involves epidermis and dermis; blisters
3rd degree burns
involves epidermis, dermis, and hypodermis; Full thickness burn; burned area appears blackened
rule of nines
divides the body into 11 areas, each accounting for 9 % of the total body surface area , plus an additional area surrounding the genitals representing 1% equaling 100%
basal cell carcinoma
(least malignant) Most common and least severe type of skin cancer; often characterized by light or pearly nodules.
squamous cell carcinoma
Type of skin cancer more serious than basal cell carcinoma; treatable if caught early
(dark color) very malignant. Use ABCD rule
A= asymmetry ( not equal); B=border irregularity (not smooth); C=color (different colors, but dark); Diameter= (bad if pencil size or larger)
repair; ; heals well, no scar.
formation of scar tissue
chromosomes become visible, spindle fibers form, and nuclear envelope breaks up
steps of mitosis (PMAT)
Prophase, Metaphase, Anaphase, and Telophase
chromosomes line up at the center of the cell and spindle fibers pull them
chromatids seperate and move to the poles and spindle fibers pull them
chromosomes dissappear and nuclear envelope forms daughter cells
cells organized for a particular function
Delicate pink tissue that forms during healing of a wound