anaphy lab 2

Tissue

a group of specialized cells and the extracellular substances (matrix) surrounding them

Histology

microscopic study of tissue structure

Pathology

study of diseased tissues

Biopsy

removal of tissue from any part of the body

Autopsy

examination of organs of a dead body to know the cause of death or to study changes caused by a disease

endoderm

the inner layer, forms the lining of the digestive tract and its derivatives

mesoderm

the middle layer, forms tissues such as muscle, bone, and blood vessels

ectoderm

the outer layer, forms the skin

EPITHELIAL TISSUE

covers and protects surfaces, both outside and inside the body

Simple epithelium

single layer of cells, with each cell extending from basement membrane to free surface

Stratified epithelium

more than one layer of cells, but only the basal layer attaches the deepest layer to the basement membrane

Pseudostratified columnar epithelium

appears to be stratified but consists of one layer of cells

Squamous

tall and thin

Cuboidal

cube

Columnar

tall and narrow

Desmosomes

mechanical links that bind cells together

Hemidesmosomes

modified desmosomes; anchor cells to the basement membrane

Adhesion belt

found just below the tight junction; not as strong as desmosomes, acts as weak glue holding cells together

Gap junctions

small channels that allow small molecules and ions to pass

Glands

secretory organs

Tubular

end of duct; shaped as tubules (small tubes)

Alveolar/Acinar

sac-like structure

Tubuloacinar/Tubuloalveolar

combination of the two

Inflammation

occurs when tissues are damaged

Clot

contains the threadlike protein fibrin that binds the edges of the wound together and stops bleeding