Make sure to work on your Organ System Puzzle Notes from this lesson should be written on your Anatomical Positions worksheet Homeostasis • Homeostasis = existence of a stable internal environment • Homeostatic regulation = keeps internal environment within desirable limits • Most often done by the nervous and endocrine systems Anatomical Position • Stands erect • Hands at the side • Palms facing forward SUPINE = person laying down face up PRONE = person laying down face down Anatomical Directions – page 14: anterior posterior ventral dorsal cranial/cephalic caudal superior inferior front or before back or behind belly side back head tail above below Anatomical Directions Cont. medial lateral proximal distal superficial deep towards the body’s longitudinal axis away from the body’s longitudinal axis closer to the trunk away from the trunk at or near the body surface farther from the body surface Sectional Anatomy Separates anterior and posterior body portions Separates superior and inferior body portions Separates right and left body portions