Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Did you know?
Your heart beats over 36 million times a year.
The eukaryotic cell cycle and cell division in an organism with six chromosomes.
The threespine stickleback (Gasterosteus aculeatus) has been used as a model organism for the study
Transgenic Prairie Voles
Biological control pits one organism against another
Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri