There are some invertebrates, but most animals require a skeleton to live on land. Bones can repair themselves, supports heavy weight, acts as a storeroom, and grow. The skeleton protects internal organs.
The first living thing with an internal skeleton existed 500 million years ago; it evolved into a spinal column. Vertebrates dominate all ecosystems. Animals adapt depending on need, weight, and style of life.
Skeletons support a human's need to move and protect organs. Bones can fracture if different forces act upon it simultaneously, but they can regenerate. Learn the composition of bone and the different bones in the axial and appendicular skeleton.
A body needs to be rigid to support its weight. Joints and articulations help movement occur. Muscles move bones in opposing directions; ligaments prevent dislocations.
The first living thing with an internal skeleton existed 500 million years ago and evolved into a spinal column. Learn the different bones in the axial and appendicular skeleton. The knee is one of the most complex articulations in the skeletal system.
Credits: The Skeleton
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The skeleton is the scaffolding of the human body, made of one of the hardest and most resistant materials found in nature. What are the skeleton’s functions? What is the role of bones in the manufacturing of blood cells? This program will answer these questions and more.
Length: 17 minutes
Copyright date: ©2013
Prices include public performance rights.
Not available to Home Video, Dealer and Publisher customers.
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