Maxim Q7. The diagrams represent the arrangement of atoms or molecules in four different substan C and D. 8 8 A B с C D not to scale Each of the circles, O, O and represents an atom of a different element. (a) (0) Which substance is a compound?​

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.