|
|
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
![Weak valve springs will produce a normal reading at idle, but as engine speed increases, the needle ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_21_49_29690515.png)
![Adjusting a valve takes both hands—one to hold the wrench to loosen and tighten the lock nut and ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_42_31_29752181.png)