…children have, on average, 300 bones, while adults usually only have 206?

This is because a lot of bones fuse together after a while, that is, they become one.

…the biggest bone in the human body is the femur which is in the thigh?

It is usually proportional to the size of the person. For someone who is 1.80 metres tall, for example, the femur is about 50 centimetres long.

… the smallest bone is inside the ear? It is called stapes and is 0.25 cm.

… it is possible to estimate how much longer a child or adolescent will continue to grow by taking an X-ray of the hand and wrist? The test, known as the bone age x-ray, shows how much the bones have developed from the space that exists between them. The more space there is between the bones, the more the young person will grow.

… Human bones are replaced over time?

They are constantly being remade, just like our skin. Thus, we get a new bone every seven years or so.

Questions
1) Where is the largest bone in the human body?
a) In the ear
b) In the head
c) In the leg
d) In the foot

2) What do you think of doing an exam to find out how much you might grow on average? Why?

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