Los huesos

The video explains the role of bones in supporting and protecting vital organs. At birth, humans have about 300 bones, which fuse to around 200 in adulthood. Bones are living tissues that regenerate every 7 years and contain blood vessels, nerve endings, and cells. They adapt to physical activity, becoming stronger with use. The spine and skull are highlighted for their protective roles. Bones are diverse in shape and function, and they remain long after other tissues decay.

How many bones do humans have at birth, and how does this number change as they grow?

In what ways are bones considered living tissue?

What are osteocytes and what role do they play in bone structure?

Describe how bones adapt to physical activity, using squash as an example.

What is the function of the spine in the human body?