It might be cellular defence. I'm not completely sure though.
D. marble i know this because i just had a test on this!
Answer:
1. true
2. human immunodeficiency virus) is a virus that attacks the immune ... HIV is often spread by people who don't know they have it.
avascularity is the option term which best explain why nutrient for epithelial cell are obtained by diffusion from the underling connective tissue. Epithelial membrane consist of continuous sheet of cell. one or more layer thick and are attached to the underlying connective tissue by a basement membrane. Nutrient and oxygen reach epithelial membrane by diffusion from blood vessel which are located in the connective tissue beneath the basemen membrane
