The horizontal fraction bar was introduced by the Arabs.
Did you know?
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?
During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
Cell Energy
Posterior half of the brain.
cell line selection
animal cell
Attachment and cell entry by HIV.
(A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ...