The membrane that lines the lumenal surfaces of the digestive, respiratory, urinary, and
reproductive tracts consists of _________.
simple squamous epithelium and dense irregular connective tissue
areolar and dense irregular connective tissue
epithelium and lamina propria
areolar tissue and lamina propria
simple squamous epithelium and areolar tissue
The replacement of damaged tissue with scar tissue is called _________.
necrosis
apoptosis
gangrene
regeneration
fibrosis
Most biologists see embryonic stem (ES) cells as a possible treatment for diseases that result
from the loss of functional cells. This possibility is based on the fact that ES cells are
__________ stem cells.