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scientists divide all animals to vertebrates and invertebrates, vertebrates have spines have, and invertebrates are not. The spine is the most important part of the skeleton.the spine is composed of vertebrae United together. inside the spinal column the spinal cord passes. Spinal cord connects with the head forming the central nervous system.the next box of bones is the rib cage. The thorax is attached to the spine and consists of the ribs and the sternum. It includes: heart and two lungsabdominal cavity consists of the digestive tract, liver, spleen, kidney, ureter, .2 of the bladder.Upper limb include hands that consist of wrists, elbows, shoulders, hands and fingers.the brush contains in itself ... bones.lower extremities include the toes, thigh, ankle, toes.Thus, the human body is made up of more than 200 bones.
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