Epithelial Tissue Flashcards
Organization of Life smallest to largest:
atoms - Molecules -Macromolecules-Organelles-Cells-Tissues-Organs-Organ Systems- Organism
What is a tissue?
group of similar cells and cell products, that work together to perform a specific structural or physiological function
4 types of tissue:
Epithelium
Connective
nervous
muscle
Epithelium
covers surfaces internal and external
Connective
connects, most abundant tissue of our bodies
Nervous
CNS and PNS→ communication
Muscle ( 3 types)
Skeletal, Cardiac, Smooth
Skeletal muscle
voluntary and striated
Cardiac muscle
Involuntary and striated
Smooth muscle
involuntary and non-striated
Epithelium
covers surfaces internal and external
Major functions of Epithelium
Protection—skin and mucus membranes
Absorption—small intestine (nutrients)
Filtration—kidneys→ renal corpuscle—glomerulus (wastes and excess substances)
Secretion—glands (hormones and enzymes)
Sensory reception
Characteristics of Epithelium
Fit closely together and form tight junctions
Apical (top) surface which is free
Attached to a basement membrane (basal lamina & reticular lamina)
Avascular but have good regeneration, depend on underlying connective tissue
Simple
1 layer of cells
stratified
more than 1 layer of cells
psuedostratified
falsely stratified