The innermost layer of an artery wall is called the and lines the
of the blood vessel in order to decrease friction.

What field of science did harry hess study?

Pulmonary arteries carry highly oxygenated blood. true or false?

You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple