Origin

The most stationary point of attachment of the Muscle, usually the Proximal point.

Orgasm

The Climax of the Sexual Act.

Organ

A collection of tissue having the same function.

Organic Compound

Chemical structure that always has carbon and hy drogen as part of the basic structure.

Organelles

Specialized parts of a Cell, ie, Mitochondria, Glogi Apparatus, Nucleus and Centrioles

Orbit

The Cavity that contains the Eyeball.

Oral Contraceptive

A Hormonal Preparation taken Orally, that prevents Conception.

Oral Cavity

The region located between the Mouth and the Pharynx. Includes the space between the Lips and Teeth. Teeth and Gums and the Cavity, and its contents, that lie between the Cheeks.