Tissues- Chapter 2.3

major types of tissue- epithelial, connective, muscular, nervous

functions of epithelial tissue- protection, secretion, absorption, filtration, excretion, senses

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Structure:

simple- one layer

squamous- flat cells

stratified- multiple layers

cuboidal- cube shaped

columnar- column shaped

simple squamous shape- single layer of flat cells

simple squamous function- diffusion and filtration

simple squamous location- found in air sac of the lungs

simple cuboidal shape- single layer of cube shaped cells

simple cuboidal function- secretion and absorption

simple cubiodal location- kidney tubules, surface of ovaries

simple columnar shape- single layer of long cells, have goblet cells and microvilli

simple columnar function- secretion and absorption

simple columnar location- digestive tract and uterus goblet cells

stratified squamous shape- several layers, flat

stratified squamous function- protection

stratified squamous location- lines body cavities; skin and mouth

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goblet cells- secrete %%mucus%%

microvilli- projections that %%increase the cell's surface area%%

Pseudostratified Columnar:

pseudostratified columnar shape- single layer with nuclei at various levels, can have g%%oblet cells and cilia%%

pseudostratified columnar function- %%secretion and cilia-aided movement%%

pseudostratified columnar location- linings of respiratory passages, tubes of reproductive system

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Transitional Epithelium:

transitional epithelium shape- thick, layered cuboidal cells

transitional epithelium function- stretchable tissue, forms barrier to block diffusion transitional epithelium location- urinary bladder

%%gland%%ular epithelium- cells that are specialized to produce and secrete substances, makes up the %%body's glands%%

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Connective Tissue:

connective tissue - most abundant tissue in your body, binds structures together

connective tissue function- provides support, protection, framework, fills space, stores fat, produces blood cells, fights infection

connective tissue composed of- scattered cells within a matrix, a ground substance and fibers

collagen and elastin- connective tissue

common types of connective tissue cells- %%mast cells, macrophages, fibroblasts%%

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Types of Connective Tissue:

collagenous fibers- strong, flexible, %%not very elastic%%, found in bones, ligaments

elastic fibers- %%not as strong,%% very elastic, found in ears, vocal

areolar tissue (%%loose%% connective tissue)- binds skin to underlying organs, forms thin membranes throughout body

adipose tissue (%%fat%%)- protective cushion, insulation to preserve body heat, stores energy

fibrous connective tissue- thick collagenous fibers and fine network of elastic fibers- %%few cells, poor blood supply%%, thus slow healing

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Important Tissue:

bone tissue- %%osseus tissue%%, rigid due to mineral salts

%%blood%% tissue- %%circulates%% throughout the body

muscle tissue- skeletal, cardiac, smooth

skeletal tissue- striated and %%voluntary%%

smooth tissue- hollow organs, %%involuntary%%

%%cardiac%% tissue- wall of the %%heart%%

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Cartilage:

cartilage- all cartilage cells are called %%chondrocytes%%

hyaline cartilage- covers %%ends of joints%%, padding

elastic cartilage- external ear, larynx

fibrocartilage- %%tough, shock absorbing%%, located between vertebrae

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Nerve:

nerve tissue- found in the brain, spinal cord, and nerves

neurons- %%transmit impulses%%

neuroglia- protection and support