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Zoology

WCHS Zoology Chapter 7 Terms of Direction

WordDefinition
aboral the end opposite the mouth
oral the end containing the mouth
anterior the head end; usually the end of a bilateral animal that meets its environment
posterior the tail end
cuadal toward the tail
cephalic toward the head
distal away form the point of attachment of a structure on the body (e.g., the toes are distal to the knee)
proximal toward the point of attachment of a structure on the body (e.g., the hip is proximal to the knee)
dorsal the back of an animal; usually the upper surface; synonymous with posterior for animals that walk upright
ventral the belly of an animal; usually the lower surface; synonymous with an anterior for animals that walk upright
inferior below a point of reference(e.g., the mouth is inferior to the nose in humans)
superior above a point of reference (eg., the neck is superior to the chest)
lateral away from the plane that divides a bilateral animal into mirror images
medial (median) on or near the plane that divides a bilateral animal into mirror images
Created by: dmoudy