Download Anatomy Notes: Epithelial and Connective Tissues and more Quizzes Physiology in PDF only on Docsity!
Epithelial
covers or lines ever body surface and all body cavities. TERM 2
Connective
DEFINITION 2 support, protect and bind organs. TERM 3
Muscle
DEFINITION 3 composed of fibers that respond to stimulation from the nervous system. TERM 4
nervous
DEFINITION 4 composed of neurons and types of glial cells that support, protect, and provide a framework for neurons. neurons 20% Glials 80% TERM 5
Functions of Epithelial
DEFINITION 5 protection, selective permeability, secretion, and sensation
characteristics of epithelial
cellularity, polarity: apical and basal surfaces, attachment to basement membrane and specialized contacts, avascularity, innervation and regeneration TERM 7
Cellularity
DEFINITION 7 epithelial tissue is composed almost of all cells and cells are bound closely together by different types of intercellular junctions. TERM 8
Polarity
DEFINITION 8 every epithelium has an apical surface and basal surface having intercellular junctions. TERM 9
attachment to basement membrane
DEFINITION 9 at the surface, the epithelial layer is bound to a thin basement membrane. TERM 10
avascularity
DEFINITION 10 all epithelial tissues lack blood vessels. epithelial cells obtain nutrients either directly across the apical surface by diffusion across the basal.
Simple
one cell layer thick and are in direct contact with the basement membranes. TERM 17
stratified
DEFINITION 17 contains two or more layers TERM 18
pseudostratified
DEFINITION 18 false layer, looks layered because cells nuclei are distributed at different levels between the apical and basal layers. TERM 19
squamous
DEFINITION 19 flat, wide and somewhat irregular in shape. nucleus looks like a flattened disc. TERM 20
cuboidal
DEFINITION 20 do not resemble perfect cubes because they dont have squared edges. nucleus is spherical and located within the center of the cell.
Columnar
slender and taller than they are wide TERM 22
transitional
DEFINITION 22 readily changes shape or appearance depending upon how stretched the epithelium becomes. TERM 23
endocrine
DEFINITION 23 make hormones, lack ducts and secrete their products directly into the interstitial fluid and bloodstream. the secretions of endocrine called hormones act as chemical messengers. TERM 24
exocrine
DEFINITION 24 digestive enzymes TERM 25
connective tissue
DEFINITION 25 very diverse but share embryonic origin (mesoderm) made of cells and extracellular matrix (non cellular, non living material between cells) protein fibers for support and ground substance holds fluid
fluid connective tissue
blood and lymph, many types of cells, suspended in a matrix RBC make up majority of elements 1% WBC platelets are fragment of cells TERM 32
resident or fixed connective tissue proper
DEFINITION 32 stay in one location and is permanently contained within the connective tissue. help support and maintain and repair the extracellular matrix. TERM 33
wandering
DEFINITION 33 move throughout the connective tissue are are involved in immune protection and repiar r of damaged extracellular matrix. remove virus and cells with cancer TERM 34
collagen fibers
DEFINITION 34 long, unbranched extracellular fibers composed of the protein collagen. strong and flexible and resistant to stretching. forms 25% of the body's protein. TERM 35
elastic
DEFINITION 35 contains the protein elastin and are thinner than collagen fibers stretch
reticular
contain the same protein subunits that collagen has and are coated with a glycoprotein. TERM 37
areolar connective tissue
DEFINITION 37 supports and cushions cells are far apart collagen and elastic attach underline organs, blood vessels, joints TERM 38
adipose connective tissue
DEFINITION 38 fat tissue provides padding, cushions shocks, acts as an insulator and stores energy huge white fat comprise of 90% content stored fat cushion around kidneys and eyeballs TERM 39
reticular connective tissue
DEFINITION 39 forms a supportive network for cells in organs such as liver, bone marrow, etc housing area for cells and make comartments TERM 40
dense connective tissue regular
DEFINITION 40 tendons and aponeuroses tie muscles to bones tendons that are sheet like structures ligaments tie bones to bones
smooth
involuntary blood vessels, intestines in walls of hallow tubes and organs. TERM 47
characteristics of muscle tissue
DEFINITION 47 skeletal: 1000 times long, 20 times thich, cylindrical fibers, multinucleated, striated, contact and relax rapidly 30 times cardiac: fibers are branched, one nucleus and sometimes two, have intercalated discs smooth: short, thin, spindle shaped, one nucleus per cell and is usually located in the middle, non striated contract and relax relatively slow TERM 48
nervous tissue characteristics
DEFINITION 48 cytoplasm is drawn out into long extensions.- impulses conductors neurons: neural cells that conduct electricity- 20% of nervous tissue glial cells: 80% of tissue support neurons, different types with unique functions TERM 49
functions of nervous tissue
DEFINITION 49 nourish, insulated and protect neurons TERM 50
locations of nervous tissue
DEFINITION 50 brain, spinal cord and nerves all over body
