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Human Skeleton Model, a jointed model with a size similar to a 170cm tall human, made of metal wire and PVC material, is an ideal model for basic anatomical teaching. The arms and legs can be removed for study. It can be placed on a fixed metal frame, is washable, unbreakable, and made of PVC for the human skeleton model.Human bones total 206, divided into the skeleton by their distribution into the axial skeleton, skull, and appendicular skeleton. The bones are connected to form the skeleton. (For example, the skull protects the brain, the chest cavity protects the heart and lungs, etc.) Skeletal muscles span one or more joints, attaching to two or more bone surfaces, under the control of the nervous system, skeletal muscles contract, pulling the bones, producing various movements. The surface of the bone is dense and hard, called the bone cortex; the internal bone is honeycomb-like, called the bone spongy; the hollow part of the bone is called the marrow cavity, which is filled with marrow. Fetal and infant marrow are red marrow, which is a hematopoietic organ. As we age, the red marrow in the marrow cavity of the long bones is gradually replaced by fat tissue, becoming yellow marrow. The skeleton: The adult skeleton has a total of 206 bones, and the bones are connected to form the skeleton, which plays a supporting, moving, and protective role in the body. Of the 206 bones, there are 23 skull bones, 51 axial bones, and 5 types of appendicular bones, irregular bones, and air-filled bones.