Functions of epithelial tissues
Provide physical protection, control permeability, absorption, and produce secretions
Basement membrane
Bottom layer that is attached to connective tissues
Two criteria epithelial tissue is classified by
Shape and layers
Avascular
Lacking blood vessels
Simple epithelial functions
Filtration, diffusion, secretion, absorption
Stratified epithelial tissue
More resistant to wear
Transitional epithelium
Can contract and stretch out
Characteristics all connective tissues have in common
Specialized cells, solid extra cellular protein fibers, fluid “ground substance”
Functions of connective tissues
Support and protection, transportation of materials, storage of energy reserves, defense of the body
Extra cellular matrix
Extra cellular components of connective tissues, it is the majority of tissue volume
Three types of cartilage and where they are found in the body
Hyaline- synovial joints, rib tips, sternum, and trachea
Elastic- external ear and epiglottis
Fibrous- found between pubic bones and intervertebral discs
Muscle tissue functions
Contract in order to provide movement
Skeletal
Striated, multinucleated, voluntary, attached to connective tissues
Cardiac
Striated, uninucleated, involuntary, found in heart
Smooth
No striations, uninucleated, involuntary, found in the walls of hollow organs
Nervous tissue functions
Conduct electrical impulses, senses internal or external environments, processes information, and controls responses
Nervous tissue location
The brain and the spinal chord
Two types of cells and how they are different
Neurons- nerve cells that perform electrical communication
Neuroglia- supporting cells that repair and supply nutrients to the neurons
Three parts of a neuron
Dendrite, cell body, axon
Location of epithelial tissues
Skin, lining of digestive, urinary, reproductive, respiratory tracts, lining of body cavities, lining of fluid filled brain cavities, lining of blood vessels and heart