|
|
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
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.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.