Why Do We Grow Old?
Why Do We Grow Old? Scientists have evolved three main theories to explain why we grow old. The first concerns the loss of cells or of irreplaceable parts. Brain cells...
Read MoreWhy Do We Grow Old? Scientists have evolved three main theories to explain why we grow old. The first concerns the loss of cells or of irreplaceable parts. Brain cells...
Read MoreWhat Makes Eyes Different Colors? What a baby is going to look like depends on the 46 genes in his body cells. Half of these genes he inherits from his mother, and half...
Read MoreWhy Do Injured Joints Swell Up? The swelling of an injured joint, like a knee or an ankle, is caused by the multiplication of normal cells to cushion the affected part....
Read MoreWhere Do Teeth Come From? Teeth are formed from specialized cells which produce the three parts of the tooth—root, neck, and crown. The outer coating of the crown is...
Read MoreWhat Are Our Eyes Made Of? The outer shell of the eyeball is made up of three coats: the fibrous tunic, composes of the cornea and sclera. The middle layer, known as...
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