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How many bones make up the human skeleton, what are they made of and how heavy are they? Are the heavy bones perhaps the only thing to blame for excess weight...?! - Here are the answers, explained simply. ------------------------------------------------------------------------------------------------------ 0:00 How many bones does a person have? 0:25 What are bones made of? 0:57 What types of bones are there? Long bones, flat bones, irregular bones 1:24 Why are bones hard? 1:42 How much do bones weigh? 1:56 How much of the body weight is made up of bones? 2:13 What happens when a bone breaks? 2:30 How does a bone break heal? What do osteoblasts do? ------------------------------------------------------------------------------------------------------ More on the topic of body structure (posture & movement): http://br.de/s/2SNfhzW More on the topic of training and fascia (posture & movement): http://br.de/s/2aaa2pO Biology topic overview: http://br.de/s/2NmJwEZ alpha Learning - videos and more: http://alphalernen.de