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There are 60,000 miles of blood vessels in every adult human.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.