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?
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
Did you know?
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
Did you know?
You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
A typical eukaryotic cell.
A typical bank statement.
A typical engine design that uses both pressure and splash lubrication. Oil travels under pressure ...
A typical port fuel-injection system squirts fuel into the low pressure (vacuum) of the intake ...
Structure of a typical cell membrane
Early growth of corn (Zea mays), a typical monocot.