Every human has 206 bones. Unless they are missing a body part. Also babies are born with 213 and they fuse together to get 206 as they grow
Babies come out through the vagina.
Candy is missing her left leg below the knee.
brain
Handicapped is the term used, if some part is missing. disease is substituted by illness.
in the private area
The lungs
In the series kyle xy the part that is missing is his belly button
a starfish is missing a few body parts like fins and tails
Arms.
regeneration
It's called a deformity which is a missing part of the body or an extra part.