20. Why do all mammals have "cracks" in their skull?
My Answer - The reason why do all mammals have "cracks" in their skull so it would be easier for the new born baby to get through the mother's private. If their skull didn't have cracks then it would be hard to push the baby.
is it good and correct????
Right.
Thanks! :)
Your answer is partially correct, but it does not explain the full reason for the "cracks" in mammalian skulls. Allow me to provide a more detailed explanation.
The presence of "cracks" in mammalian skulls is not specifically to facilitate the birthing process, although it does play a role in it. The primary reason mammals have visible sutures or "cracks" in their skulls is related to the growth and development of their brain.
Mammalian brains grow rapidly during prenatal and early postnatal stages. As the brain expands, it needs more space within the skull to accommodate its growth. However, the skull bones of mammals are not fully fused during these stages. Instead, they have fibrous joints called sutures, which allow for flexibility and growth.
The presence of sutures enables the skull bones to expand outward as the brain grows, providing necessary room for development. This growth and expansion continue until the bones eventually fuse together, typically during adolescence or early adulthood.
During childbirth, the sutures in the skull also allow for slight movement, facilitating the passage of a newborn's head through the birth canal. The ability for the skull to compress slightly aids in the birthing process by reducing the risk of injury to both the mother and the baby.
So, in summary, the "cracks" or sutures in mammalian skulls primarily exist to accommodate brain growth and development, while also aiding in the birthing process.