Video Finder

Being identical though may have different names or aspects.

Collecting representative data from some members of a population, to help understand the larger population.

A wall that separates the left and right sides of the heart.

Vibrations that travel through the air and can be perceived by most human and animal ears.

Observed, detectable, or experienced signs of an illness, injury, or condition.

The vast 3-dimensional region that begins where Earth's atmosphere ends. Outer space has very low density and pressure, and is the closest we have to a perfect vacuum.

Country in Southeast Asia.

Subregion in Northern Europe.

A neurological event that occurs when the blood supply to the brain is blocked, depriving the tissue of oxygen, or when there is a bleed into the brain due to the rupturing of an artery.

Being identical though may have different names or aspects.