What organs can regenerate themselves?

The liver is the only human internal organ capable of natural regeneration of lost tissue; as little as 25% of a liver can regenerate into a whole liver. Regeneration is very rapid. The liver will return to a normal size in one to two weeks following the removal of greater than 50% of the liver by mass.

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What color is an insect's blood?

Insect blood, which is called hemolymph, contains various nutrients, hormones, and other things, but does not have any red blood cells or hemoglobin. That is why it is not red in color, and instead is rather clear.

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Do your ears grow as you get older?

Bones, stop growing after puberty and muscle and fat cells also stop dividing. But cartilage - that's the plastic-like stuff in ears and noses - cartilage continues to grow until the day you die. Not only does cartilage grow, but the earlobes elongate from gravity. And that makes ears look even larger.

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What months are the equinoxes?

The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere). The days on which an equinox falls have about equal periods of sunlight and darkness.

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What makes a primary color?

Red, yellow and blue are the primary colors. Primary colors are the most basic colors. You can't make them by mixing any other colors. Orange, green and purple are the secondary colors. A secondary color is made by mixing two primary colors. For instance, if you mix red and yellow, you get orange.

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What percentage of the earth's water is frozen?

Of the three percent of the water that is not in the ocean, about 69 percent is locked up in glaciers and icecaps. Ninety percent of that frozen water is in Antarctica and about nine percent covers Greenland. Of the remaining freshwater, 30 percent of it is groundwater, captured below our feet.

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Which is the master gland in human body?

The thyroid gland, ovaries, testes, mammary glands, and the cortex of the adrenal glands are all stimulated by the hormones of the anterior pituitary, resulting in the pituitary gland being known as the “master gland” for its control of the endocrine system.

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What stretch of water separates Greenland and Iceland?

The Denmark Strait is a 300km wide stretch of water that separates Iceland from Greenland. This thin strait, although tiny in the context of the Atlantic Ocean, just so happens to be one of the most important ocean channels in the world.

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Is Antarctica a desert and why?

Despite its thick ice, Antarctica is classified as a desert because so little moisture falls from the sky. The inner regions of the continent receive an average of 2 inches (50 millimeters) of precipitation—primarily in the form of snow—each year. More rain falls in the Sahara desert.

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Why do only males have adam apples?

When the larynx grows larger during puberty, it sticks out at the front of the throat. This is what's called an Adam's apple. Everyone's larynx grows during puberty, but a girl's larynx doesn't grow as much as a boy's does. That's why boys have Adam's apples.

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