After a fetus has developed for only three months, what is its skeleton made of? muscle bone cartilage tendon

Cartilage

Explanation:

This cartilage forms the initial skeleton of the fetus; right after three months of development. This cartilage is the precursor to bones that will develop from the endochondral ossification process.

During endochondral bone development, hyaline cartilage functions as an epiphyseal growth plate and this plate remains functional as long as the bone is growing in length. In the adult's long bone, hyaline cartilage is present only on the joint surface. In adults, it is also present as a skeletal unit in the trachea, bronchi, larynx, nose and extremities of the ribs (costal cartilages).

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