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Anatomy and Physiology I
Orientation and Directional Terms
11
Biology
Undergraduate 1
05/22/2006

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Term
Superior
Definition
Toward the head end or upper part of a structure or the body; the head is superior to the abdomen
Term
Inferior
Definition
Away from the head end or toward the lower part of a structure of the body; below-the navel is inferior to the chin
Term
Anterior
Definition
Ventral-toward or at the front of the body; in front of-the reastbone is anterior to the spine
Term
Posterior
Definition
Dorsal-Toward or at the back of the body; behind-the heart is posterior to the breastbone
Term
Medial
Definition
Toward or at the midline of the body; on the inner side of-the heart is medial to the arm
Term
Lateral
Definition
-away from the midline of the body; on the inner side of The arms are lateral to the chest
Term
Intermediate
Definition
between a more medial and a more lateral structure; the collarbone is intermediate between the breastbone and shoulder
Term
Proximal
Definition
Closer to the origin of the body part or the point of attachment of a limb to the body trunk; the elbow is proximal to the wrist
Term
Distal
Definition
Farther from the origin of a body part or the point of attachment of a limb to the body trunk; the knee is distal to the thigh
Term
Superficial
Definition
Toward or at the body surface-the skin is superficial to the skeletal muscles
Term
Deep
Definition
Internal-the lungs are deep to the skin
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