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77 Cards in this Set
- Front
- Back
Skeletal organ system
function organs involved |
protects, supports body organs
bones and joints |
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integumentary system
function organs involved |
protects from external environment
skin, hair and nails |
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muscular system
function organs involved |
allows for movement, posture and heat
muscles that are voluntarily used |
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nervous system
function organs involved |
respond to internal and external changes
brain, nerves, spinal cord viscera |
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endocrine system
function organs involved |
produces hormones that regulate functions
pitutary and pineal glands, pancreas, thymus |
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cardiovascular system
function organs invoved |
transports O2,CO2, etc from tissues to blood
heart, arteries, veins |
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lymphatic system
function organs involved |
protects against disease
lymphatic vessels, spleen, lymph nodes |
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respiratory system
function organs involved |
oxygenating blood, removing CO2
nose, lungs, trachea |
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digestive system
function organs involved |
breaks down food so it can be absorbed
stomach, liver, large and small intestine |
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unrinary system
function organs involved |
eliminating Nitrogenous wastes from body
kidneys, ureters, bladder, urethra |
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reproductive system
function organs involved |
reproduction of offspring
male- tested, scrotum, penis etc female- ovary, uterus, vagina |
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Negative feedback
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imbalance in homeostasis. the effect and the reaction are in opposite directions. most common. body glucose levels FALL, so body releases insulin, levels RISE.
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Positive feedback
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imbalance of homeostatis. least common. the effect and result are in the same direction. contractioms
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serous membrane
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lines body cavity that does not open to exterior
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mucous membrane
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lines body cavity that does open to exterior
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4 tissue types
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epithelial
connective nervous muscle |
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3 types of cell junction
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desmosomes
tight junction gap junction |
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5 characteristics of epithelial cells
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1. avascular
2. cellularity 3. special contacts 4. polarity 5. innervated |
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function of epithelial cells
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protection, secretion, absorbtion
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classification of epithelial cells
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1. simple squamos
2. simple cuboidal 3. simple columnar 4. stratified squamos 5. transitional |
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simple squamos
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found in areas that do not need protection. thin lair that allows for rapid diffusion.
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pseudostratified columnar
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prime tissue of respiratory tract (cilia)
contains goblet cells. main function is secretion |
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2 types of glands
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endocrine glands- secretions are directly into blood stream. mainly hormoes
exocrine- secretions put through a duct. |
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heterocrine
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pancreas, has exocrine and endocrine functions
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merocrine secretion
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products are secreted by exocytosis. (Pancreas, salivary, sweat)
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holocrine system
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sebatious glands (oil). products in cell continue to accumulate until cell ruptures
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apocrine
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cell that produces secretory product, it rises to the apical surface where the top is sloughed off, releasing the content. (mammory gland)
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mesenchyme
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embryonic tissue that all connective tissue arises from
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characteristics of connective tissue
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has specialized cells (-cytes)
and Maxtrix, groud substance and fibers. |
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stroma
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structural support components of an organ, even though it has no role in function
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areolar characteristics
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not very dense
highly vascularized, highly elastic |
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adipose characteristics
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sparse matrix
richly vascularized, develops where areolar is plentiful shock absorbe and insulation |
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reticular characteristics
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resembles areolar but more fibers int he matrix. forms a network where fibroblasts lie.
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Dense regular connective tissue
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closely packed bundles of collegen fibers running in the same direction. allows tissue to stretch to an extent (ligaments, tendons)
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dense irregular connective tissue
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collegan fibers are thicker then dense regular and arranged irregularly. found where tension is in more than one direction
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cartilage
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stand to tension and compression. lacks nerve fibers and avascular. nutriets are from diffusion. fluid matrix allows it to rebound after compression,
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chondroblasts
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predominate cell type of growing tissue
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hyaline cartilage
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most abundant
large number of collagen fibers covers ends of long bones |
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elastic cartilage
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nearly identical to hyaline but more elastic fibers. found where strength and stretchability are needed
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fibrocartilage
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found where hyaline cartilage meets a true ligament or tendon. compressible and resists tension well. gives strong support.
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osseous tissue
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supports and protects. provides cavity for fat storage, RBS production
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blood
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atypical connective tissue. has fibers that are dissolved.
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3 types of membranes
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cutaneous- skin
mucous- lines body cavity that open to exterior serous- lines cavities that do not open to exterior |
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3 types of muscle
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smooth-involuntary, not striated.
skeletal-voluntary, has striations and many nuclei cardiac- heart, intercalated discs, striated branched |
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neuron
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only cell that conducts action potential using electrical signal, it controls the function of the cell.
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simple columnar
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main function is to absorb. found lining the digestive tract
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stratified squamos
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protects underlying tissue in areas subject to abrasion.
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simple cuboidal
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secretes and absorbes. found in small glands
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proteoglycan
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found in ground substance and is the amount present represents how viscous the substance is.
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mast cell
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function is to detect foreign substances. they are filled with granulars and are responsible for immediate inflammation.`
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macrophages
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large cells that active phagocitize fungi, bacteria, and other harmful cells.
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lamina propria
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loose connective tissue underneath the epithelium
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subcutaneous
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superfical fascia
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components of epidermis
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keratin, stratified squamos
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merkel cells
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sensory receptors that sense light touch
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stratum basale
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bottom layer. one row of cells (keratinocytes). rapidly undergoing mitosis. aka stratum germinativum
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stratum spinosum-
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spiny layer. cells are connected by desmosomes. cells contain thick filament used to make keratin.
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stratum granulosum
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grainy layer. cells are beginning to die. they are flattened, organells deteriorating.
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stratum corneum
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has glycolipids to make skin waterproof. dead keratinocytes.
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stratum lucidum
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"clear layer" only found in the thick non-hairy skin. an extra layer of protection.
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hypodermis
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adipose tissue backed by areolar connective tissue. aka superficial fasia or subcutaneous layer
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langerham cells
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macrophases toxins, etc. immune functions. epidermal dendritic cells.
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2 layers of dermis
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papillary layer- connects epidermis to dermis. areoloar connective tissue.
reticular layer-80% of dermis, dense irregular connective tissue |
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sudoiferous gland
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eccrine gland- sweat gland
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sebatious gland
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found around hair follicals.
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arrector pilli muscles
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cause hair to "stand up"
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stratum corneum
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accounts for 3/4 of epidermal thickness.
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pacinian corpuscle
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deep pressue receptor
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thick skin
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palms, fingertips, soles of feet. has 5 layers. deep to superficial stratum: basale, spinosum, granulosum, lucidum and corneum.
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thin skin
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all other areas of body, no stratum lucidum, and layers are thinner.
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melanocytes
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cells that synthesis pigment, melanin.
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eccrine glands
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sweat gland (merocrine sweat gland) abundant on palms, soles of feet and forehead.simple tubular gland
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apocrine sweat gland
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ducts empty into hair follicles. found in anogenital and axillary areas.
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ceruminous gland
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modified apocrine gland. produces cerumen (ear wax)
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mammary gland
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secretes milk, modified sweat gland
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sebaceous gland
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secretes sebum. simple areolar gland. found all over except palms and soles. holocrine glands
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sebaceous gland
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secretes sebum. simple areolar gland. found all over except palms and soles. holocrine glands
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