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Learn essential anatomical terms like superior, inferior, anterior, posterior, medial, lateral, and more to describe body structures and positions accurately. Understand directional terms such as proximal, distal, superficial, and deep, along with body planes like sagittal, frontal, and transverse.
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Anatomical Position • body erect • feet together • arms hanging at sides • palms facing forward
superior inferior anterior posterior medial lateral intermediate proximal ipsilateral contralateral distal superficial deep parietal visceral Directional Terms
Superior • towards the head • upper part of structure • above • Examples: - forehead is superior to the nose - lips are superior to the chin - heart is superior to the liver
Inferior • away from head end • toward lower region of structure or body • Examples: - navel is inferior to the breastbone - knee is inferior to the hip - stomach is inferior to the lungs
Anterior • towards the front • in front of • Examples: - breast bone is anterior to the spine - front teeth are anterior to the back teeth - sternum is anterior to the heart
Posterior • toward or at the back • behind • Examples - heart is posterior to the sternum - molars are posterior to the front or anterior teeth - esophagus is posterior to the trachea
Medial • towards the midline • inner side of • Examples: - head is medial to the arm - ulna is on the medial side of the forearm
Lateral • away from the midline • towards the side • Examples: - eye is lateral to the bridge of the nose - lungs are lateral to the heart
Intermediate • between a more medial and more lateral structure • Examples: - collar bone is intermediate between the breast bone and the shoulder - ring finger is intermediate between the little and middle fingers
Proximal • close to origin or point of attachment • sides next to each other • Examples: - elbow is proximal to the wrist (closer to the shoulder than that the wrist) - humerus is proximal to the radius
Ipsilateral • on same side of the body • Examples: - ring finger is ipsilsteral to the little or middle fingers
Contralateral • on the opposite side of the body • Examples: - ascending and descending colons of the large intestine are contralateral
Distal • farthest from origin • Examples: - knee is distal to thigh - wrist is distal to shoulder - phalanges are distal to the carpals (wrist bones)
Superficial • towards the surface • Examples: - skin is superficial to the skeleton - muscles of the thoracic wall are superficial to the lungs
Deep • more internal • Examples: - heart is deep in relation to the skin - nasal sinuses are deep in relation to the nose
Parietal • pertaining to or forming the outer wall of a body cavity • Example: - parietal pleura forms the outer layer of the pleural sacs that surround the lungs
Visceral • pertaining to the covering of an organ within the ventral body cavity • Example: - visceral pleura forms the inner layer of the pleural sacs and covers the external surface of the lungs
Body Planes • imaginary lines used to divide body into sections - sagittal - mid-sagittal - frontal - transverse - oblique
Sagittal • vertical plane • lengthwise • longitudinal • divides the body into right and left portions
Mid-sagittal • midline • divides the body into equal right and left portions
Frontal(coronal) • right angles to sagittal plane • divides the body into anterior and posterior portions
Transverse(horizontal) • divides the body into superior and inferior regions
Oblique • an oblique plane passes at an angle between transverse and frontal planes or between transverse and sagittal planes