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Types of Tissues

germ layers the primary tissue layers that will produce the major tissue types
3 primary germ layers ectoderm, mesoderm, endoderm
ectoderm outside germ layer in the digestive system, liver, pancreas and lungs
mesoderm middle germ layer that forms muscle and cardiovascular systems, also in blood and skeleton
endoderm inside germ layer that forms skin and nervous system
histology study of tissues
3 tissue types epithelia, connective, muscle, and neural
tissue groups of cells and their non-cellular products similar in structure and function
epithelium tissue almost no intercellular space b/t cells, has no blood supply, cells are attached by basement membrane, has 3 categories
connective tissue found throughout body internally, designed to connect other tissues, most abundant tissue, has more non-cellular parts than cells, has 4 categories
nervous tissue composed of neurons and support cells, has more support cells than neurons
muscle tissue specialized in contraction, different cell structure in its power, subdivided into three categories
epithelium tissue structure has 2 types: simple and stratified and 3 kinds of shapes: squamous, cuboidal, and columnar
connective tissue structure has 4 types: connective tissue proper, cartilage, bone, blood
nervous tissue function and area gives commans, controls, and communicates, found in brain, spinal chord, and nerves
muscle tissue structure subdivided into 3 tissue types: skeletal, cardiac, and smooth
simple epithelium tissue single layered cells
stratified epithelium tissue multiple layered cells, classified by the cells on top (apical layer)
simple squamous epithelial cells flat tissue cells found in the lungs and lining of the blood cells that reduce friction, for lining and protection
simple cuboidal epithelial cells cube-like cells found in kidneys cells that secrete and absorb
simple columnar epithelial cells long and tall looking cells found in digestive tract cells that secrete and absorb
simple ciliated columnar epithelial cells long with hair-like structures found in uteran tubes cells that transport eggs or sperm to site of fertilization
pseudostratified ciliated columnar epithelial cells long cells with smaller cells all connected to basement membrane found in upper respiratory tract cell that protects, secretes, brings up mucous
stratified keritonized squamous epithelial cells layered skin cells containing insoluble protein found in hair and nails cells that protect
stratified non-keritonized squamous epithelial cells live, wet surface cells located in lips, esophagus, oral/nasal cavity, and vagina cells that provide resistance from abrasions as long as it is kept moist
transitional epithelial cells cells have several layers and vary in shape, found in urinary bladder cells that stretch
connective tissue tissue found throughout body and designed to connect other tissues, is the most abundant and has more non-cellular products than actual cells that helps classify tissue
4 types of connective tissue connective tissue proper, cartilage, bone, and blood
3 basic components of all connective tissue specialized cells, extracellular protein fibers, and fluid called ground substance
loose areolar connective tissue part of connective tissue proper, has a lot of non-cell products, looks like threads w/some cells, found underneath epithelium tissue tissue that provides padding and stretches
adipose tissue part of the connective tissue proper composed of fat cells, tightly packed found under skin tissue that serves as packing and energy source
reticular connective tissue part of connective tissue proper that has blackish thorns, found in lymph nodes, bone marrow, spleen tissue that acts as a net to catch immune or blood cells
dense regular connective tissue part of the connective tissue proper that has collagen proteins(pink fibers), found in tendons and ligaments tissue that attaches bones to bones
dense irregular connective tissue part of the connective tissue proper that has collagen fibers that go every which way, found in the dermis of skin tissue acts like leather on the skin, protecting it from abrasions
hyaline cartilage meaning rubber, this cartilage has cells called chondrocytes surrounded by lacunae or pool, found in rib cage cartilage reinforces and supports and is strong and flexible
elastic cartilage cartilage that has black elastic-like hairy fibers located in the external ear cartilage that gives flexibility and support to organ
fribrocartilage cartilage cartilage with blue collagen fibers found in the intervertebral disc of the vertebrae cartilage supports knee and spinal joints because of its strength
bone (osseous tissue) tissue has hard solid non-cellular products (matrix) yet somewhat flexible located in bones tissue provides structure
blood tissue part of connective tissue composed of red and white cells, found in blood vessels tissue transports oxygen and nutrients, removes waste, and transports hormones
nervous tissue tissue composed of neurons and an abundance of yellow support cells, found in brain, spinal chord, and nerves tissue commands, controls, and communicates
muscle tissue tissue specialized for contraction, has 3 types of tissue that differ in organization tissue capable of powerful contractions that shorten the cell
3 types of muscle tissue skeletal, cardiac, and smooth
skeletal muscle tissue is long, cylindrical, striated and multinucleate, mixed with conn. tissue and neural tissue tissue moves the skeleton, guards the e/e to digestive, respiratory, and urinary tracts, generates heat, protects internal organs
cardiac muscle cells are short, branched, and striated, usually with single nucleus, cells are interconnected by intercalated discs, located in the heart tissue circulates blood and maintains blood pressure
smooth muscle tissue cells are short, spindle-shaped, and nonstriated, with single, central nucleus, found in walls of blood cells and in digestive, respiratory, urinary, and reproductive organs, has a lot of nuclei moves food, urine, and reproductive tract secretions, controls the diameter of respiratory pathways and blood vessels
Exocrine glands glandular epithilia that secrete products onto the epithelia surface or ducts, located on the surface examples include sebaceous, sweat, mammary, and salivary glands
Endocrine glands glandular epithelia that secrete products (hormones) directly into the blood
Created by: sgmonico