chapter 4

A sheet of cells that covers body surfaces or cavities

• Epithelial tissue

• connective tissue

• muscle tissue

• nervous tissue

Two main forms of the epithelial tissue

• supporting and protecting epithelia and glandular epithelia

• covering and lining epithelia and glandular epithelia

• destroying and eating the dead epithelia cells, and glandular epithelia

Protection, absorption, filtration, excretion, secretion, and sensory reception are the main functions of the epithelial tissues

• TRUE

• FALSE

what is apical surface

• upper free side, is exposed to surface or cavity, most surfaces are smooth

• lower attached side, faces inwards toward body, attaches to basal lamina

what is basal surface

• upper free side, is exposed to surface or cavity, most surfaces are smooth

• lower attached side, faces inwards toward body, attaches to basal lamina

What is basal lamina? what does it act as?

• nonadhesive sheet that holds basal surface of epithelial cells to overlying cells. Acts as a filter

• nonadhesive sheet that holds apical surface of epithelial cells to underlying cells. Acts as a filter

• an adhesive sheet that holds apical surface of epithelial cells to overlying cells. Acts as a filter.

• an adhesive sheet that holds basal surface of epithelial cells to underlying cells. Acts as a filter

The specialized fingerlike projections of apical surfaces

• microvilli

• lamina

• desmosomes

• polarity

All epithelial sheets are supported by connective tissue

• TRUE

• FALSE

Does epithelium contain blood vessels? how does it receive its nutrients?

• yes, receives its nutrients from the blood vessels

• no and yes, only thick parts of the skin do not have blood vessels, the rest is nourished by the vessels

• no, nourished by diffusion from underlying connective tissues

Do they have high regenerative capacities

• It has a high regenerative capacity

• It has a low regenerative capacity