Term
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Definition
| A group of similar cells that perform a common function. |
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Term
| Four major types of body tissue |
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Definition
Epithelial- Covers body surface & organs, lines body cavities
Connective- Binds & supports body parts
Muscular- Contracts
Nervous- Responds to stimuli & transmits impulses from one body part to another
*organs "typically" composed of all 4 types
4c's
Tissue Cover-Connect-Contract-Communicate |
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Term
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Definition
-Cells are tightly packed with little space between them.
-Externally protects body from drying out,injury |
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Term
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Definition
| are cancers of the epithelial tissue |
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Term
| 2 attributes to classify Epithelial Tissue |
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Definition
| Number of cell layers & Shape of cells |
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Term
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Definition
-Simple E.T is one cell later thick
-Stratified E.T is two or more layers |
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Term
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Definition
-Squamous has flattened cells
-Cuboidal has cube-shaped cells
-Columnar has elongated cells(taler then it is wide) |
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Term
| 2 specialized Epithelial Tissues |
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Definition
| Transitional Epithelium & Pseudostratified Columnar Epithelium |
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Term
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Definition
One later of flattened cells
-Found in areas where diffusion occurs
Ex. Blood capillaries
Air Sacs of lungs |
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Term
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Definition
Many layers of flattened cells
-protection from abrasion
Ex.- Skin
Lining of esophagus,mouth & vagina |
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Term
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Definition
One layer of cube-shape cells
-Secretion & absorption
Ex.- Salivary glands
ovaries
Linings of the kidney tubules |
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Term
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Definition
Two / more layers of cube-shape cells
-lines larger ducts of certain glands
Ex.- Salivary gland
&
Mammary gland ducts |
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Term
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Definition
One layer of elongated cells
-Protection,secretion,absorption
Ex.- Lines digestive organs
& uterine tubes
& small intestine |
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Term
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Definition
Two / more layers of elongated cells
-Not very common
Ex.- Back of throat
male urethra |
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Term
| Pseudostratified Columnar |
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Definition
-Appears to have more then one layer of cells, but only has one true later
Ex.- Air passageways of respiratory system |
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Term
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Definition
-Many layers but when tissue stretches,layers become fewer
-Changes in response to tenison
Ex.- Urinary bladder
Ureters
Urethra |
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Term
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Definition
Binds structures together
Supports body parts
Produces blood cells
Stores fat
Cells seperated by extracellular matrix |
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Term
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Definition
Composed of organic substance, contains fibers
Collagen
Elastic
Reticular |
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Term
Classification of Connective Tissue
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Definition
Fibrous Connective Tissue
Cartilage
Bone
Blood
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Term
| Fibrous Connective Tissue |
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Definition
Includes loose and dense connective tissue
Make up body's membranes |
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Term
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Definition
Type of loose connective tissue in which the cells enlarge & store fat
Protects & cushions many organs
Stores energy |
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Term
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Definition
Dense regular connective tissue
Bundles are parallel
Connect muscles to bones |
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Term
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Definition
Cancers of connective tissue |
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Term
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Definition
Cells are called chondrocytes
Heals very slowly, no direct blood supply
Three Types:
Hyaline-msot common, found in nose, ends of long bones, ribs
Elastic-found in outer ear
Fibro-absorbs shock,reduce friction, found between vertebrae & knee joint |
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Term
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Definition
Extremely hard matrix of mineral salts (calcium) deposited around collagen fibers
Canteen for calcium
Two Types: Compact & Spongy |
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Term
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Definition
Outer portion of long bones
Arranged in osteons
Central canals contain blood vessels & nerve fibers
Ex of location- skeleton |
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Term
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Definition
Ends of a long bone
Arranged in trabeculae
Lighter than compact
Follow lines of stress
Blood cells formed within red marrow |
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Term
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Definition
Composed of:
Erythrocytes(RBC)-carry oxygen
Leukocytes(WBC)-fight infection
Thrombocytes(Platelets)-clot blood
Liquid matrix(plasma) not formed by tissue cells |
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Term
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Definition
Contractile Tissue
Composed of cells called muscle fibers
Protein filaments account for movement |
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Term
| Classification of Muscular Tissue |
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Definition
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Term
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Definition
Striated/Voluntary
Attached to skeleton
When Ske.Mus. contracts the muscle shortens & body parts move
Have cylindrical shape & are long |
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Term
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Definition
Spindle-shaped/Involuntary
Found in the walls of hollow organs
Contracts slowly, can remain contracted for a long time
Contracts rhythmically |
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Term
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Definition
Straited/Branched/Involuntary
Found ONLY in the walls of the heart
Pumps blood
Single,central nucleus
Bound together by intercalated disks |
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Term
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Definition
Fibers have alternating light & dark bands
Give them striped appearance due to placement of actin & myosin filaments |
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Term
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Definition
You have complete control over the muscle |
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Term
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Definition
Not under your concious control
automatic |
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Term
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Definition
Found in the brain & spinal cord
Contain neurons & neuroglia
Communicate with the rest of the body |
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Term
Neurons
Definition & parts |
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Definition
Nervous Tissue Cells
conduct impulses
Three parts:
dendrite-recieves an impulse
cell body-contains the nucleus
axon-conducts nerve impulses |
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Term
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Definition
Support & nourish the neurons
Outnumber neurons 9 to 1
More than half the volume of the brain |
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Term
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Definition
Junctions between cells that help the cells function as a tissue
Types:
Tight
Gap
Adhesion |
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Term
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Definition
Plasma membrane proteins join, form an impermeable barrier
Zipperlike
Ex- in the stomach, in the kidneys |
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Term
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Definition
Plasma membrane channels join, allowing for the transfer of materials between adjacent cells
Strength
Ex- in the heart |
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Term
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Definition
Desmosome
Adjacent plasma membranes held together by extracellular filaments
membranes do not touch
Ex- join heart muscles
in the cervix |
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Term
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Definition
Secrete their product into ducts
Ex- sweat, mammary, & pancreas glands |
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Term
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Definition
Ductless, secrete their product internally to be transported by the bloodstream
Ex- pituitary &thyroid glands
produce hormones |
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Term
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Definition
Refers to the wall of the body cavity
Parietal membranes line the interior of thoracic & abdominopelvic cavities |
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Term
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Definition
Refers to internal organs
Visceral membranes cover individual organs |
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Term
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Definition
Line internal spaces of organs & tubes that open to outside & also line body cavities
Mucous-Line walls of organs &tubes to out
Serous-line cavities Cover internal organs
Synovial-line freely movable joint cavities
Meninges-protective cover for brain& spinal
Cutaneous-skin |
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Term
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Definition
Lines thoracic wall
Pleura think lungs |
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