Chapter 39 Section 1 Flashcards
anatomy
the study of organisms’s structure
physiology
the study of how the body functions
tissue
a group of closely associated, similar cells that carry out specific functions
types of tissues
epithelial
connective
muscle
nervous
classification of tissue depends on
structure and origin
cells in each kind of tissue have characteristic
sizes, shapes, and arrangements
structure and function are closely linked
.
epithelial tissues cover the body and line its cavities
.
epithelial tissue
tissue that consists of cells fitted tightly together to form a continuous layer, or sheet, of cells.
lumen
the cavity in a hollow organ
basement membrane
the underlying tissue of an epithelial layer that consists of tiny fibers and nonliving polysaccharide material that the epithelial cells produce
functions of epithelial tissue
protection
absorption
secretion
sensation
epidermis
epithelial (outer) layer of the skin
squamous epithelial cells
thin, flat cells shaped like flagstones
cuboid epithelial cells
short cylinders that from the side appear cube-shaped, like dice.
columnar epithelial cells
look like columns or cylinders when viewed from the side
endothelium
the lining of blood and lymph vessels
gland
one or more epithelial cells specialized to produce and secrete a product such as sweat, milk, mucus, wax, saliva, hormones, or enzymes
goblet cells
mucus-secreting cells
exocrine glands
secrete their products onto a free epithelial surface
Ex) goblet cells and sweat glands
endocrine glands
- lacks ducts