Scientific question?

Question

Ive been learning about the human body in school but
Ive been wondering for the answer to these questions:

How are the human bones formed or created?
How do they adapt or grow as the body grows?
What is the first human body bone formed?

Answer 1

There is something called stem cells. When the human fetus develops from a blastocyte, originally all the cells are similar. At some point, the cells start to differentiate into skin, muscle, bone, nerve and other specialized needs.

Some of the stem cells become bone cells, and start forming bones.

I'm not sure what bone is formed first, but I would guess the the skull or back bone.

Answer 2

Bones form in one of two ways: endochondral ossification or intramembranous ossification. In endochondral ossification a hyaline cartilage bone model is calcified and replaced by bone. Long bones such as the femur form this way. In intramembranous ossification, the mesenchyme is replaced directly by bone (no cartilage is involved). Flat bones such as the bones of the skull form this way.

Bones adapt to stress through a process called remodeling.

I would guess that the spine is the first to form since the neural tube forms so early. Don't know for sure though.

Answer 3

all human bones start as cartilage inthe embryo, the actual first place that we see "bone" as we know it is in the ends of the long bones such as the femur, humerus,radius, ulna, tibia and fibula.

type "embryology+bone+development" in the seach bar of your search engine, like google or yahoo.