Bone in rib eye steak

Check out these retro videos from Encyclopedia Britannica’s archives. WTFact Britannica shares some of the bone in rib eye steak bizarre facts we can find.

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Articles from Britannica Encyclopedias for elementary and high school students. The two principal components of bone are collagen and calcium phosphate, which distinguish it from other hard tissues such as chitin, enamel, and shell. Bone tissue makes up the individual bones of the skeletons of vertebrates. Bone contains 99 percent of the calcium in the body and can behave as an adequate buffer for maintaining a constant level of freely moving calcium in soft tissues, extracellular fluid, and blood. Why is calcium important for bone health? The mechanical strength of bone is proportional to its mineral content. The Food and Nutrition Board of the U.

How does vitamin D deficiency affect bones in humans? A deficiency in vitamin D results in poor mineralization of the bones of the skeleton, causing rickets in children and osteomalacia in adults. Evolutionary origin and significance Bone is found only in vertebrates, and, among modern vertebrates, it is found only in bony fish and higher classes. In modern vertebrates, true bone is found only in animals capable of controlling the osmotic and ionic composition of their internal fluid environment. This was a necessary step for the emergence of terrestrial vertebrates.