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Zoology
WCHS Zoology Chapter 7 Terms of Direction
Word | Definition |
---|---|
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 |