Human Body Topics
Many people have heard some version of the saying “it takes X muscles to frown, but only Y muscles to smile,” with X usually being larger than Y, to suggest that it should be easier to smile than frown. The numbers in this saying can vary quite radically, however, and even when one accounts for [...]
A neurotransmitter is a specialized messenger chemical that transfers or sends information from one type of cell to another. Scientists have managed to identify over 100 neurotransmitters in the human brain alone, but evidence suggests we have significantly more than this number. An unfortunate aspect of not being able to identify all neurotransmitter cells is [...]
he ovulation period lasts 24 to 48 hours. That seems like a very narrow window to get pregnant, but it’s important to remember that sperm can live 3 to 5 days in the woman’s body. So while your chances of getting pregnant are much better if you have sexual intercourse in the day or two [...]
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Unlike men, who produce new sperm daily throughout most of their lifetime, women are born with all their eggs in one – okay, two baskets (ovaries). To be more precise, a woman is born with about one to two million immature eggs, or follicles, in her ovaries. Throughout her life, the vast majority of follicles [...]
Humans have 24 ribs (12 pairs). The first seven sets of ribs, known as “true ribs”, are directly attached to the sternum through the costal cartilage. Rib 1 is unique and harder to distinguish from other ribs. It is a short, flat, C-shaped bone. The vertebral attachment can be found just below the neck and [...]
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Sex—and smooching and snuggling and everything else on the spectrum—is great for your relationship and happiness, but intimate time with your sweetie is also terrific for your physical health. Not only does that “loving feeling” get your heart rate up, it can burn some serious calories, too! Remember how, when you were first dating, you’d [...]
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How much calcium do you need? Regardless of your age, one cup (8oz) of milk a day, which provides about 300 mg of calcium, is not enough to keep your bones strong and healthy. It is recommended that people in their twenties get at least 1,000 mg of calcium each day which would be about [...]
How Many Human Genes are There in The Human Genome? Got a hunch about how many genes are contained in the human genome? Well, if you are passing by the Cold Spring Harbor Laboratory, in New York, you may want to drop by and place a bet. Genome scientists did just that at the Genome [...]
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How much does the weather affect our mood? Can the weather affect our mood? This has always been an intriguing subject. It has been studied by scientists and sociologists. One would think so, just to make an educated guess, especially if it has happened to you. Like when the days are extremely hot, and you [...]
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