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Valerie Chavez, Period Five: Histology - Coggle Diagram
Valerie Chavez, Period Five: Histology
EPITHELIAL TISSUE
stratified squamous
location: (nonkeratinized) forms moist linings: esophagus, mouth, vagina; (keratinized) forms epidermis of skin - dry epithelium
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structure: multiple layers, flat cells, oval nuclei
stratified cuboidal
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structure: multiple layers, cube shape cells, round nuclei
simple columnar
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function: absorption; secretion of mucus, enzymes, & other substances
structure: one layer, long cells, oval nuclei
simple cuboidal
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structure: one layer, cube shape cells, round nuclei
simple squamous
location: kidney glomeruli; air sacs of lungs; lining of heart, blood vessels, & lymphatic vessels; serosae
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structure: one layer, flat cells, oval nuclei
stratified columnar
structure: multiple layers, long cells, oval nuclei
function: perform secretion; protection of underlying tissues w/ multiple layers of epithelial cells
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MUSCLE TISSUE
skeletal
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structure: generally straight,has striations w/ nuclei along strands
function: voluntary movement; locomotion; manipulation of the environment; facial expression; voluntary control
smooth
structure: no striations, resembles squamous epithelium
function: propels substances / objects (foodstuffs, urine, baby) along internal passageways
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cardiac
structure: striated branches with oval nuclei, also containing intercalated discs
function: as it contracts, blood is pumped into the circulation; involuntary control
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CONNECTIVE TISSUE
bone / osseous
structure: resembles wood; osteocytes, haversian canal / system (osteon); canaliculi (string like structure within)
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function: protects / supports body; helps muscle movement; stores minerals (calcium) & fat; marrow in bones = site for blood cell information
hyaline cartilage
structure:: resembles eyeballs (chondrocytes); scattered, not aligned in a specific order; chondrocytes can be single, or be in pairs of 2 / 3
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location: embryotic skeleton; covers ends of long bones in joint cavities; costal cartilages of ribs; lungs, trachea, and larynx
elastic cartilage
structure: resembles hyaline cartilage, but chondrocytes are more plentiful; has noticeable amounts of elastic fibers; looks flat towards sides of tissue
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areolar / loose
structure: web-like structure; two types of strands (collagen / elastic fibers); dark nucleus spread throughout
function: wraps / cushions organs; (macrophages) phagocytize bacteria; plays key role in inflammation; holds / conveys tissue fluid
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reticular
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location: lymphoid organs (lymph nodes, bone marrow, & spleen)
function: forms a soft internal skeleton (stroma) that supports other cell types including white blood cells, mast cells, & macrophages
dense
structure: looks like waves; stringy; slightly visible, flat nuclei
function: attaches muscles to bones / muscles; bones+ bones; withstands great tensile stress when pulling force is applied in one direction
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blood
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function: transport respiratory gases, nutrients, wastes, and other substances
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NERVOUS TISSUE
structure: neurons + neuroglia, neurons consist of cell body, axon, nucleus, and dendrites (resembles tadpole)
function: neurons transmit electrical signals from sensory receptors to effectors (muscles & glands); supporting cells support & protect neurons
location: brain, spinal cord & nerves
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MEMBRANES
cutaneous: aka skin; primary role = protect the rest of body tissues & organs from physical damage, chemical damage, & biological damage (microorganisms)
serous: tissue, lines certain internal cavities of body, forming smooth, transparent, two-layered membrane lubricated by fluid (plurae, peritoneum & pericardium)
mucous: epithelial tissue = secretes mucus, lines body cavities & tubular organs including the gut / respiratory passages