The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
The egg cell
ACE, Ca channel blockers
Major cell types in the human body.
Reproductive Cell Division: Meiosis I
The cell cycle has three stages: interphase, mitosis, and cytokinesis