Anatomy & Physiology 1 Flashcards
heirarchy of structural organization
chemical level, cellular level, tissue, organ, organ system, organism
4 types of tissue
epithelial tissue, connective tissue, muscle tissue, nervous tissue
What is histology?
the study of tissues and how they form organs
Definition of tissues
Group of cells closely associated that have a similar structure and perform a related function
epithelial tissue functions
protection, secretion, absorption, ion transport
classes of epithelium layers
simple, stratified, pseudostratified
classes of epithelium shapes
squamous, columnar, cuboidal, transitional
epithelial tissue examples
lining of GI tract organs & other hollow organs
skin surface/epidermis
types of epithelium
simple squamous, simple columnar, simple cuboidal, pseudostratified columnar, stratified squamous keratinized, stratified squamous non-keratinized, transitional
2 types of specialized epithelium
endothelium & mesothelium
endothelium
lines vessels
lymphatic and blood vessels
mesothelium
lines body cavities
pleura, peritoneum, pericardium
2 features of apical surface of epithelium
microvilli and cilia
microvilli
e.g. small intestine; finger-like
cilia
e.g. respiratory tubes; whip-like
3 types of cell junctions (a feature of the lateral surface of epithelium)
desmosomes, gap junctions, tight junctions
desmosomes
proteins hold cells together to maintain tissue integrity
gap junctions
proteins allow small molecules to pass through
tight junctions
plasma membrane of adjacent cells fuse, nothing passes
2 components of basal surface of epithelium
basal lamina, reticular fiber layer
basal lamina
superficial layer, acts as a layer
reticular fiber layer
deeper layer, acts as support
4 types of connective tissue
ct proper (loose and dense), bone, cartilage, blood