Terms that are being used in Anatomy is Anatomical Terminology. They are made up of suffixes, prefixes and root words that are mainly derived from Ancient Greek or Latin. Without the knowledge of anatomical terms, a medical professional cannot be able to discuss the location, position of organs or their abnormality, functions of joints and the actions of muscles.
To use the Anatomical Terms, the body is supposed to be in the erect posture, with the arms hanging by the sides and the palms of the hands directed forward, and thumbs pointing away from the body, and the legs are parallel with the toe facing forward. This is called as anatomical position.
For descriptive purpose when the body in the anatomical position, commonly three hypothetical planes are used.
Sagittal plane is a plane parallel to the sagittal suture of the skull. Median plane is a mid-sagittal plane that is used to describe the sagittal plane as it bisects the body vertically through the midline marked by the navel. It divides the body into Left and Right. If something is closer to the midline or median plane – it is Medial. Lateral describes something away from the midline.
It separates the anterior from the posterior.