Video Finder

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.

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 cartilage wall separating the nostrils of the nose.

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

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.