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Histology
Jasmine Rodarte, p.5 - Coggle Diagram
Histology
Jasmine Rodarte, p.5
Epithelial Tissues
Simple Squamous
-1 layer of flattened cells, disc nuclei, sparse cytoplasm Function
-allow material to pass diffusion & filtration
Location
-kidnet glomeruli; air sac; lining heart; blood & lyphatic vassals
Simple Cuboidal
-1 layer of cube-like cells w/ large, spherical nuclei
Function:
-secretion 7 absorption
Location
-kidney tubules
-ducts & secretory portions of small glands
-ovary surfaces
Stratified Columnar
-limited distribution in body
-small amount in pharynx, male urethra, glandular glands
Simple Columnar
-1 layer of tall cells, oval nuclei
Function:
-absorption; secretion of mucus
Location:
-digestive tract, gallbladder, small bronchi, uterine tubes
Stratified Squamous
-thick, multiple cell layers, basal cuboidal & columnar, surface flatten
Function
-protect underlaying tissue in areas of abrasion
Location
-esophagus, mouth, & vagina
Stratified Cuboidal
-rare
-sweat & mammary glands 2 cell layer, thick
Pseudostratified Columnar
-1 layer, different heights, nuclei seen in different layers
Function:
-secrete substance, mucus
Location:
-trachea, upper respiratory tract, male sperm-carrying ducts
Transitional
-stratified squamous, basal cuboidal & columnar
Function
-stretched urine to distend unrainy organ
Location
-line the uterus, bladder, & part of the urethra
Nervous Tissues
-neurons: generate & conduct nerve impulse
-supporting cells: support, insulate & protect
Function: transmit electrical signals from sensory receptors & efforts (muscle & glands); supporting cells support & protect neurons
Location: brain, spinal, & nerves
Types of Membranes
Serous Membrane
-in closed ventral body cavities
-parietal serosa cever internal organs
Location:
-pleurae, pericardium, peritorieum
Mucous Membrane
-shows cell location, not cell composition
-line body cavities
-may secrete mucous
-
Muscular Tissues
Smooth Muscle
-cells tapered on both ends w/ central nuclei
-no striations
Function:
-propel substances or objects along internal passage way
Location:
-walls of hallow organs
Skeletal Muscle
-long, cylindrical, multi nucleate cells
Functions:
-voluntary movement
-skeletal muscles attached to bones or occasionally skin
Cardiac Muscle
-branched, striated, generally uni nucleated cells
Function:
-as it contracts, it propels blood into the circulation
-involuntary control
Location:
-walls of heart
Connective Tissues
Blood
-most atypical tissue b/c it fluid
-red blood cells are most common
-transport and carry nutrients, wastes, gases, and other substances
-
Loose
Areolar
-gel-like matrix
Function:
-wraps &cushion organ
-important in inflammation
-hold & convey tissue fluid
Location:
-under epithelia of body
Adipose
-sparse, closely packet fat cells, nuclues pushed to the side
Function:
-reserve food fuel
-insulates heat loss
-support & protects organs
Locations:
-subcuntaneous tissue, around kidney & eyeball, within abdomen in breasts
Reticular
-loose network of reticular fibers in el-like substances
-reticular cells lie on fibers
Function:
-fibers form a soft internal skeleton that support other cell types
-lymphoid organs
Dense
Regular
-major cell type
Function:
-attaches muscle to bone; withstands tensile stress when pulling force applied in one loacation
Location:
-tendons, most ligaments, aponeuroses
Elastic
-dense regulars connective tissue contain high proportion of elastic fiber
Function:
-maintain pulsatile flow of blood through arteries; passive recoil of lungs
Location:
-walls of large arteries; walls of bronchial tube
Irregular
-some elastic fibers; fiberoblast major cell type
Function:
-withstands tension exerted in many directions
Location:
-Fibrous capsules of organs & joints; dermis of skin; submucosa of digestive tract
Cartilage
Hyaline
-support & reinforce
-most abundant appears shiny bluish glass
-found at the top of long bone, trachea, larynx, & at rib
Elastic
-more elastic fibers than hyaline
-found in ears & epiglottis
Fibrocartilage
-collagen fibers absurd compressive shock
-strong
-found in interverebral discs & knee
Glands
Endocrine
-internal secreting (hormones)
-ductlessglands (secretion not released into duct; released into duct; released into interstitial fluid)
Exocrine
-external secreting (sweat)
-released onto body surfaces
-ex: mucous, sweat, oil, & salivary gland
Unicellular:
-important, mucous cell & goblet cells
-found in epithelial linings intestinal & respiratory tract
-composed of a duct & secretory unit