Question

Which is the only bone in the body not in contact with another bone?

Answer 1

The human skeleton serves as the body's internal structure. It is made up of about 270 bones at birth, but by adulthood, this number has dropped to around 206 bones since certain bones have fused. Around the age of 21, the skeleton's bone mass achieves its maximum density.

Complete answer:
In most vertebrate animals, a bone is a hard tissue that forms part of the skeleton. Bones protect the body's different organs, generate red and white blood cells, store minerals, provide the body structure and support, and allow mobility. Bones have a complicated internal and exterior structure that comes in a range of forms and sizes. They're light but tough, and they're useful for a variety of things.
Our body's structure is provided by bones. There are 206 bones in the mature human skeleton. The skull, spine (vertebrae), ribs, arms, and legs are among them. Bones are made up of connective tissue that is calcium-reinforced, as well as specialized bone cells. Bone marrow, which produces blood cells, is found in almost all bones.
Bones cooperate with muscles and joints to keep our bodies together and allow us to move freely. The musculoskeletal system is what it's called. The skeleton protects sensitive internal organs including the brain, heart, and lungs while supporting and shaping the body.
The majority of our calcium supply is stored in our bones. The body is continually constructing and destroying bone tissue as needed. A balanced diet, frequent weight-bearing activity, and the proper levels of different hormones are all necessary for bone health.
The hyoid bone is the only bone in the body that does not have direct bony attachments to the rest of the skeletal system. Ligaments and muscles connect to other bones. The tongue is moved by the hyoid bone, which is supported by ligaments and muscles.

Thus, the hyoid bone is the only bone in the body not in contact with another bone.

Note:
Various studies have looked at the hyoid bone's sex dimorphism, and the variation appears to be constant across many measures. Angles of measurement from the body to the larger and lesser tubercles, length of the horns, and body thickness are only a few of the variances.