« previous next »
« previous next »
 

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

DNA molecules replicate to form identical chromatids DNA molecules replicate to form identical chromatids
Embryonic cells form the placenta Embryonic cells form the placenta
Covalent bonds form by the sharing of electrons Covalent bonds form by the sharing of electrons
This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p
Bank reconciliation form. Bank reconciliation form.
Ferns disperse by releasing spores that form on the underside of leaves. Ferns disperse by releasing spores that form on the underside of leaves.
Video: Cardiac Cycle (Part 2 of 4)

For a complete list of videos, visit our video library