Arteries have one-way valves that prevent the backflow of blood.

Materials stored inside recycling facilities may not be stacked closer than ___ feet (m) from the ceiling in buildings without sprinkler systems

A. 2 (0.6) B. 3 (1) C. 4 (1.2) D. 5 (1.5)

The hormone ____stimulates the growth of blood vessels (angiogenesis), particularly in the uterus and the milk glands, leading to breast enlargement.

Fill in the blank(s) with the appropriate word(s).