Answer:
it's either the first answer or the last one
Explanation:
not quite sure
It is called peristalsis and it occurs in Oesophagus
The answer is Microbiology.
Microbiology is a branch of science which deals microscopic organism. These micro organisms include bacteria, viruses, protozoa, fungi, and archaea. The study all deals on how organisms develop from a single cell into independent living creature. This single cell is called the unicellular cell.
The adult heart pumps about five quarts of blood each minute so around 2,000 gallons<span> of blood each day.A typical athlete's heart churns out up to </span>eight gallons<span> of blood per minute.</span>