The surface of an alveolus in a mammal is well supplied with tiny blood vessels known as? by Sunday | Sep 10 | Biology JAMB | 0 comments A. arterioles B. venules C. arteries D. capillaries Correct Answer: Option D – capillaries Users Also Read These:What is the probability? of a man of blood group AB…An electric generator has e.m.f. of 240 V and…In an elastic collision; momentum is conserved as…It is well structured with fine particles, tiny and…Which of the following blood vessels have valves?