click below
click below
Normal Size Small Size show me how
Histology
Types of Tissues
Question | Answer | Function |
---|---|---|
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 | |