WCHS Zoology Chapter 7 Terms of Direction
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| aboral | the end opposite the mouth
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| oral | the end containing the mouth
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| anterior | the head end; usually the end of a bilateral animal that meets its environment
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| posterior | the tail end
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| cuadal | toward the tail
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| cephalic | toward the head
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| distal | away form the point of attachment of a structure on the body (e.g., the toes are distal to the knee)
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| proximal | toward the point of attachment of a structure on the body (e.g., the hip is proximal to the knee)
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| dorsal | the back of an animal; usually the upper surface; synonymous with posterior for animals that walk upright
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| ventral | the belly of an animal; usually the lower surface; synonymous with an anterior for animals that walk upright
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| inferior | below a point of reference(e.g., the mouth is inferior to the nose in humans)
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| superior | above a point of reference (eg., the neck is superior to the chest)
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| lateral | away from the plane that divides a bilateral animal into mirror images
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| medial (median) | on or near the plane that divides a bilateral animal into mirror images
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