D 
DEEP:
Extending well inward from an outer surface.
DESCENDING AORTA:
The protion of the aorta from the arch to its division in the abdomen into the common iliac arteries.
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DESCENDING COLON:
The part of the colon between the left colic flexure ("splenic flexure") and the sigmoid colon (at the pelvic brim).
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DEEP LYMPH NODES:
Small masses of lymphatic tissue that connect lymph vessels in the deep fascia.
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DIAPHRAGM:
The muscle and membrane separating the abdominal and thoracic cavities of the body. Major inspiratory muscle. (also the source of meat for "fajitas" - aka "skirt steak")
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DIAPHYSIS:
The shaft of a long bone between the two "metaphyses"; tube of compact bone surrounding the marrow cavity.
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DIPLOIC SPACE:
The medullary space between the dense cortical bone of inner and outer tables of the flat calvarial bones of the skull, composed of cancellous bone and bone marrow.
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DISC and DISC SPACE:
The space between the vertebrae, formed from a fibrous ring (the annulus) and a central "cushion" (nucleus pulposis).
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DORSAL:
Being or located near, on, or toward the back or posterior part of the human body.
DORSALIS PEDIS ARTERY:
The continuation of the anterior tibial artery, that branches into the lateral and medial tarsal, arcuate, and deep plantar arteries.
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DORSUM SELLAE:
The posterior bone margin of the pituitary fossa, that is the superior limit of the sphenoid bone. The dorsum sellae forms the boundary between the middle and posterior cranial fossae in the midline.
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DUODENAL BULB:
The portion of the duodenum that forms the superior flexure with the pylorus.
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Bug Report
Portions © 1997, 2002 J.G. Smirniotopoulos, M.D. and others.