The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.

The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.

Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.

Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction.  In contrast, scalar quantities are quantities that are fully described by a magnitude only.  A variable indicating a vector quantity will often be shown with an arrow symbol:  \(\vec{v}\)

The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.