Answer:
b
Explanation:
it could also be a, c, or d
Answer: Simple squamous epithelium is the type of epithelial tissue that lines the air sacs and allows the exchange of substances like gases.
Explanation:
Simple cuboidal epithelium is made up of a single layer of these cube shaped cells that are mostly involved in absorption of substances.
carbon and hydrogen must be present. o is oxygen. 2h and 1o is water. 2c is carbon dioxide. h and o and c is water and carbon and o is oxygen. hoc-o is h and c.