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A bone is a rigid organ that constitutes part of the vertebrate skeleton. Bones support and protect the various organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility. Bones come in a variety of shapes and sizes and have a complex internal and external structure. They are lightweight yet strong and hard, and serve multiple functions.

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Do babies have kneecaps?

New born babies' kneecaps do not show up in x-rays because they start off as cartilage and are not fully developed into bones until 3-5 years of age.

Contributed by Kathy Guo

Titanium Alloy

Why are all medical implanted devices (dental implants, joint replacement, bone pins/rods etc) made of titanium alloy? It's extremely strong yet very light weight, non-corrosive in bodily fluids, has heat expansive properties similar to bone and is not magnetic making it highly bio-compatible allowing osseointegration (process of bone fusing to the metal)

Contributed by Beth Wiecher


Commonly prescribed bisphosphonate medications to help slow the osteoporosis process; normal bone is in a constant cycle of resorption (osteoclast action) and repair (osteoblast action) but with osteoporosis there is more osteoclast than osteoblast actions thus the bone becomes porous and brittle. Bisphosphonates interfere with osteoclast action which may slow osteoporosis but is also interferes with the bone's ability to repair resulting in osteonecrosis or bone death (osteo- bone, necrosis- death)

Contributed by Beth Wiecher

Osteoporosis risk factors, development and treatment simplified

Contributed by Beth Wiecher

Osteoporosis related fractures occur in 1 in 3 women and 1 in 5 men; viewed by many as a "women's disease" but 1 in 5 seems pretty common to me.....

Contributed by Beth Wiecher


you can see difference in the bone structure and why there is a greater risk for fractures

Contributed by Beth Wiecher

Osteoporosis is caused by a deficiency in vitamin D and Calcium and occurs most commonly in women mainly due to the change in hormone levels during menopause

Contributed by Beth Wiecher

The absence of the fibula, pretty cool :)

Contributed by Dana Zavorka

This bone video shows the process of bone repair after a fracture. For me bones are very amazing and fascinating so I wanted to post something the would help people understand a little something about bones. With the drawing detail of the bones, speed, and his knowledge is very fascinating and makes the video more interesting.

Contributed by Tresa Garcia

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