Tissues! Flashcards
Function of epithelial tissue
Physical protection
Control permeability
Sensation
Produce specialized secretions
Function of connective tissues
Fills internal spaces
Supports other tissues
Transports materials
Stores energy
Function of muscle tissue
Contraction
Function of neural tissue
Carry electrical signals from one part of the body to another
Characteristics of epithelia
Cell junctions Polarity Attachment( basement membrane or basal lamina) Avascularity Regeneration
Apical surfaces
Microvilla
Cilia
Increase absorption or secretion
Move fluid
Tight junctions
Very strong between two plasma membranes. Prevents passage of water and solutes
Gap junctions
Holes between neighbor cells
Allows rapid communication
Allows ions to pass
Spot desmosomes
Hemidesmosomes
Tie cells together and allow bending and twisting
Attach cells to basement membrane
Simple squamous epithelium
Absorption and secretion
Mesothelium lines body cavities
Endothelium lines heart and blood vessels
Stratified squamous epithelia
Protects against attack
Keratin protein adds strength and water resistance
Simple cuboidal epithelia
Secretion and absorption
Found in kidneys and kidney tubules
Transitional epithelium
Allow stretching and recoiling
Found in urinary bladder
Simple columnar epithelium
Absorption and secretion
Pseudostratified columnar epithelium
Has cilia movement and every cell is attached to basal membrane
Glandular epithelia
Endocrine- no ducts, releases hormones into circulation
Exocrine- produces secretion into environment through ducts
Merocrine secretion
Cell remained undisturbed
Apocrine secretion
Top of cell is released with secretion
Holocrine secretion
While cell is destroyed
Functions of connective tissue
Structural framework for body Transport fluids and dissolved material Protection of organs Support of other tissues Storing energy reserves Defending body from invading organisms
3 characteristics of connective tissue
Specialized cells
Solid extra cellular protein fibers
Fluid extra cellular ground substance
Classification of connective tissue
Connective tissue proper- connnect and protect
Fluid connective tissue- transport
Supporting connective tissue- structural strength
Fibroblasts
Are the main cells that make up connective tissue proper
Adipocytes
Fat cells that are connective tissue