Biology-Human Body

Bones

• Your bones support your body and protect your vital organs.
• Ribcage protects heart and lungs.
• As you grow some of your bones fuse together.
• Your bones are organs and are alive.
• Over a period of about seven years all yours bones in your body are gradually replaced.
• Bones contain: blood vessels, nerve cells and living bone cells called osteocytes.
• These are all held together by non-living calcium and phosphorous.
• Bone tissue adapts, bones may change shape slightly and specialise for different functions.
• The spine is…