![]() ![]() ![]() Hydroxyapatite is in turn composed of 39.8% of calcium, 41.4% of oxygen, 18.5% of phosphorus, and 0.2% of hydrogen by mass. However, bones are not entirely made of calcium, but a mixture of chondroitin sulfate and hydroxyapatite, the latter making up 70% of a bone. The bone matrix can store calcium and is involved in calcium metabolism, and bone marrow can store iron in ferritin and is involved in iron metabolism. In adults, it occurs mainly in the pelvis, cranium, vertebrae, and sternum. In children, haematopoiesis occurs primarily in the marrow of the long bones such as the femur and tibia. The skeleton is the site of haematopoiesis, the development of blood cells that takes place in the bone marrow. The rib cage, spine, and sternum protect the lungs, heart and major blood vessels.The skeleton helps to protect many vital internal organs from being damaged. Shifting from hunting to agriculture has caused human bone density to reduce significantly. It is believed that the reduction of human bone density in prehistoric times reduced the agility and dexterity of human movement. Muscles, bones, and joints provide the principal mechanics for movement, all coordinated by the nervous system. Movement is powered by skeletal muscles, which are attached to the skeleton at various sites on bones. the ball and socket joint allows a greater range of movement than the pivot joint at the neck. The joints between bones allow movement, some allowing a wider range of movement than others, e.g. Without the rib cages, costal cartilages, and intercostal muscles, the lungs would collapse. The pelvis, associated ligaments and muscles provide a floor for the pelvic structures. The skeleton provides the framework which supports the body and maintains its shape. The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulation. Their functions are to make locomotion possible and to protect the major organs of digestion, excretion and reproduction. The appendicular skeleton (126 bones) is formed by the pectoral girdles, the upper limbs, the pelvic girdle or pelvis, and the lower limbs. ![]() Unlike most primates, human males do not have penile bones. The human female pelvis is also different from that of males in order to facilitate childbirth. In general, female skeletal elements tend to be smaller and less robust than corresponding male elements within a given population. The human skeleton is not as sexually dimorphic as that of many other primate species, but subtle differences between sexes in the morphology of the skull, dentition, long bones, and pelvis exist. The human skeleton performs six major functions: support, movement, protection, production of blood cells, storage of minerals, and endocrine regulation. The appendicular skeleton, which is attached to the axial skeleton, is formed by the shoulder girdle, the pelvic girdle and the bones of the upper and lower limbs. The axial skeleton is formed by the vertebral column, the rib cage, the skull and other associated bones. The human skeleton can be divided into the axial skeleton and the appendicular skeleton. 10–11 kg for an average person) and reaches maximum mass between the ages of 25 and 30. The bone mass in the skeleton makes up about 14% of the total body weight (ca. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together. "Such a brilliant project! I am very impressed that you made it happen under these unprecedented times.The human skeleton is the internal framework of the human body. "I thought the tour was brilliant and choice of animals amazing! It was lovely to hear the curator - and children!" You had each found something that interested you and your enthusiasm shone through, making me want to go and visit the museum one day." "Thank you students for bringing alive some of the exhibits of the Grant Museum. Very informative and the enthusiasm of the pupils is infectious." "I loved this virtual tour! Especially some labels are translated into other languages so this would be helpful for foreigners too! Interesting to see various choices and really enjoyed them!" Your well written labels and video clips really brought the objects to life and made me want to visit, really good work from everyone! Thank you to everyone from George Mitchell School for sharing your experience, follow your ambitions and I hope we will be welcoming you to UCL as students or Directors in the future." "What a great insight to the objects in the Grant Museum. "Thanks Yew class for a wonderful tour of the museum! It was really interesting to hear what you enjoyed about the project and about your thoughts on UCL and going to university. ![]()
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