Explores the latest research on marijuana, including the scope of marijuana use in the U.S., health consequences, its effects on every-day activities, available treatments.
Definition of homunculus. plural. homunculi. play \hÅ-ËmÉÅ-kyÉ-ËlÄ«, -ËlÄ\. 1 : a little man : manikin. 2 : a miniature adult that in the theory of preformation is held to inhabit the germ cell and to produce a mature individual merely by an increase in size.
A pacemaker is a device which sends electrical signals to the heart triggering heartbeats when needed. There are many ways to implant and configure a pacemaker; it may beat the top chambers (atria), lower chambers (ventricles) or both. Some systems stimulate both the left and right ventricles together.