Bones

Bones support and protect the body, starting with around 300 at birth, fusing to about 200 in adulthood. They are living organs, constantly renewing every seven years. Bones contain blood vessels, nerve cells, and osteocytes, held by a calcium-phosphorus framework. They adapt to use, growing stronger with activity. Different bone shapes serve various functions, like the spine's support and flexibility or the skull's protection. Bones are vital, diverse, and long-lasting organs.

How many bones does a human adult typically have?

• Around 100

• Around 200

• Around 400

• Around 300

What is the term for the living bone cells found in bones?

• Chondrocytes

• Myocytes

• Neurons

• Osteocytes

What happens to bones when they are frequently used in activities like squash?

• They grow larger and stronger

• They become weaker

• They shrink

• They remain unchanged

How many bones make up the human spine?

• 24

• 26

• 28

• 30

What is the primary function of the skull?

• To support the body

• To protect the brain

• To aid in digestion

• To assist in breathing