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 irrep
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Cells
What Makes Eyes Different Colors?
What 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 inheri
Why Do Injured Joints Swell Up?
Why 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 t
Where 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…
What Are Our Eyes Made Of?
What 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. T