IndietroStudy Guide: Tissues 2/3
Termini in questo insieme (23)
Apical refers to the surface of an epithelial cell that faces the lumen or outside environment.
Basal describes the surface of an epithelial cell that faces the basement membrane.
The basement membrane is a thin, fibrous layer that separates epithelial tissue from underlying connective tissue.
The basal lamina is the upper layer of the basement membrane, composed mainly of collagen and glycoproteins.
The reticular lamina is the lower layer of the basement membrane, made of collagen fibers produced by connective tissue.
Squamous epithelial cells are flat and thin, resembling scales.
Cuboidal epithelial cells are cube-shaped with roughly equal height, width, and depth.
Columnar epithelial cells are taller than they are wide, resembling columns.
Simple epithelium consists of a single layer of cells.
Stratified epithelium has multiple layers of cells stacked on top of each other.
Pseudostratified epithelium appears layered due to nuclei at different levels but is actually a single cell layer.
Transitional epithelium can stretch and change shape, found in organs like the bladder.
A gland is a structure that produces and secretes substances like hormones or enzymes.
Endocrine glands secrete hormones directly into the bloodstream.
Exocrine glands secrete substances through ducts onto epithelial surfaces.
Tubular glands have tube-shaped secretory portions.
Acinar glands have rounded, sac-like secretory portions.
Merocrine secretion releases products by exocytosis without cell damage.
Holocrine secretion releases products by cell rupture and death.
Fibroblasts are connective tissue cells that produce collagen and extracellular matrix.
Mast cells are immune cells that release histamine during inflammation.
Adipocytes are fat cells that store energy as lipids.
Monocytes are white blood cells that differentiate into macrophages for immune defense.