tissue Flashcards
single flat layer of cells that is permeable and thin
simple squamous epithelium
single layer of cube shaped cells
simple cuboidal epithelium
thick layers of cells that provide protection for the underlying layers
stratified squamous epithelium
more than one layer of cuboidal cells
stratified cuboidal epithelium
free surface is lined with columnar cells
stratified columnar epithelium
The cell nuclei are found at different levels so it appears to be stratified, although it’s not
pseudostratified epithelium
free surface cells vary in appearance based on the stretching of the tissue
transitional epithelium
single layer of tall closely packed cells
simple columnar epithelium
Where is simple columnar epithelium found?
lining of digestive tract
where is simple squamous epithelium found?
blood vessels and lung tissue
where is simple cuboidal epithelium found?
kidney tissue
where is stratified squamous epithelium found?
epidermal layer of the skin
where is stratified cuboidal epithelium found?
salivary and mammary glands
where is stratified columnar epithelium found?
larynx and male urethra
where is pseudostratified epithelium found?
upper respiratory tract
where is transitional epithelium found?
lining of urinary bladder
Glands are made up of a group of cells that secrete fluid through ducts
glandular epithelium
Secrete substances outward through a duct (sweat glands)
Exocrine Gland
Ductless glands that secrete hormones through the bloodstream (thyroid glands)
Endocrine Gland
Cells excrete the products via exocytosis (sweat gland)
Merocrine Gland
A portion of the cell pinches off with the secreted products (mammary gland)
Apocrine Gland
Cells rupture and spill products into the duct (sometimes blocking it and creating zits) (sebaceous-oil glands in skin)
Holocrine Glands
Complexity and how substances are secreted
2 ways glands are classified
proper, cartilage, bone, blood
4 types of connective tissue
nervous, muscle, connective, epithelium
4 types of tissue
provides support and binds other tissues together, provides insulation and protection, some are able to transport
connective tissue
the stem cells that all connective tissues come from
mesenchyme
presence of blood vessels
vascularity
areolar, adipose, reticular
loose connective tissue
regular, irregular, elastic
dense connective tissue
mostly open space, holds water and salt, found under epithelium and around organs
areolar
compromised of fat cells, have large vacuoles that contain fat/oil
adipose
contains reticular fibers, which create a stiff framework that support other cells
reticular
collagen fibers are arranged in one direction, provides “tensile strength” like a rope, found in tendons and ligaments
regular
collagen fibers are arranged in many directions, provides strength in multiple directions, found in capsules around organs
irregular
provides flexible cushioning, found between vertebrae and in arteries
elastic (connective tissue)
doesn’t have nerves or blood vessels
hyaline, fibro cartilage, elastic
cartilage
glassy looking, firm ground substance with lacuna (space for cells), few collagen fibers, found in larynx, bridge of nose, and ribs
hyaline
contains lots of collagen, mostly running parallel, found in intervertebral spaces
fibro cartilage
highly flexible, more elastic fibers, found in outer ear and tip of nose
elastic (cartilage)
