I could be wrong but I think it's c.
The posterior fontanelle usually closes by age 1 or 2 months. It may already be closed at birth. The anterior fontanelle usually closes sometime between 9 months and 18 months. The sutures and fontanelles are needed for the infant's brain growth and development
Skeletal muscles
Structure; they are long cylindrical fiber, striated, many peripherally located nuclei.
Functions; Voluntary movement, produces heat, protects organs.
Examples; the biceps, slow twitch fibers, fast glycolytic fibers.
Cardiac muscles
Structure; they are short, branched, striated, single central nucleus
Functions; Contracts to pump blood, they are found in the heart
Examples; Heart muscles
Smooth muscles
Structure; They are short, spindle shaped, no evident of striation, single nucleus in each fiber
Function; Involuntary movement, moves food, involuntary control of respiration, moves secretions, regulates the flow of blood in arteries by contraction.
Example; Muscles found in the walls of hollow organs like the intestines, stomach and the blood vessels.
<span>exergonic reactions release energy while endergonic reactions absorb energy</span>
Basically, we don't have the right advancements in technology to replace organs yet.