what is glandular epithelial?

Answer 1

I think you are asking about GLANDULAR EPITHELIUM

Glandular means "having glands"

and Epithelium is the outer covering of a part of the body - the bit that interacts with the outside world such as skin, the lining of the mouth or the eye, the linings of the air passages and the gut etc.

Have a look at the wiki page on epithelium to get a bit of an idea of this first.

You can see that there are different types of epithelium depending on which part of the body it relates to.

The glandular epithelia (that's the pleural) are the ones which can secrete stuff like
o SWEAT (ie. skin)
o MUCOUS (ie. lining of respiratory tract)

Answer 2

It's kind of complicated, but then so is the question.

Epithelial tissue is composed of cells physically close together with very little intervening intercellular substance. Epithelial tissue is found lining internal surfaces and covering external surfaces of the body. Thus it is classified in general terms as covering and lining epithelium. Epithelial functions include protecting the body from the environment, transporting of molecules, establishing boundaries between compartments and creating fluid environments. The outer layer of tissue that makes up the skin is an epithelial tissue. The entire GI Tract is lined with epithelial tissue. The entire vascular system is lined with epithelial tissue.
The other kind of epithelial tissue is glandular, ranging in composition from as small as a single cell secreting mucus, to a large gland like the liver consisting of millions of cells secreting multiple products.

http://www.tropeduweb.ch/Manual_Ogilvie/002-Epithelium-2.pdf