What is the skeleton of a newborn baby mainly composed of?

A newborn baby's skeleton is mainly composed of cartilage. This is because the baby's bones are still developing and have not yet fully ossified (turned into bone).

Here's a breakdown:

* Cartilage: A strong, flexible tissue that acts as a precursor to bone. It provides structure and allows for growth.

* Bone: A harder, more rigid tissue that gradually replaces cartilage as the baby grows.

As the baby grows, cartilage is gradually replaced by bone through a process called ossification. This process continues throughout childhood and adolescence, eventually resulting in a fully ossified adult skeleton.

While the baby's skeleton is primarily cartilage, there are some bones that are already fully ossified at birth, such as the skull bones. These bones help to protect the delicate brain.

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