Question

Numbers of bones in a newborn baby.

Answer 1

Hint: The system of the human body has the internal framework of the skeleton. The total number of bones is around 270 at birth but eventually, this number decreases to 206 by adulthood because some bones get fused together. Mass of the bone reaches its maximum density when a person is around age 21.

Complete answer:

-Bones of newborn babies are partially or totally made up of cartilage and later replaced by bones as children grow up. There are around 300 bones in a newborn baby.

-As the bones of newborn babies are made up of cartilage. That’s why newborns are so flexible because cartilage is more flexible than bones.

-Endochondral ossification is a process in which time is taken by bones to form and develop.

-The calcium-rich bones totally replace the cartilage. This process is promoted by the actions of osteoblasts and osteoclast.

-Cartilaginous bones slowly laid by calcium salts. Thus, bone tissues become hard. This process is known as the calcification of bones.

-There are only 176 true bones in a newborn and the remaining 300 are cartilaginous bones, which means they are not yet calcified.

-Babies don't have kneecaps. They appear until the children reach the age of 10 to 12.

-Before this age knee caps are made up of cartilage and fatty tissue.

-The babies have an extra number of bones because of the unfused cartilaginous bones.

Note: 

-Endochondral ossification is the process of hardening of bones.

-There are a total of 300 bones in newborn babies and they eventually grow together and form 206 bones, which most adults have.