The phrase genetic engineering, unfortunately, often conjures up images of macabre experiments resulting in Frankenstein-like monsters and the cold-hearted use of genetic information to create new social classes depending on our genes, as in the 1997 film Gattaca.2} However, genetic engineering can simply be defined as the manipulation or alteration of the genetic structure of a single cell or organism.
Medullary cavity. From Wikipedia, the free encyclopedia. The medullary cavity (medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored; hence, the medullary cavity is also known as the marrow cavity.owever, the medullary cavity is the area inside any bone (long, flat, etc.) that holds the bone marrow.
The pelvic cavity is bounded cranially by the abdominal cavity, dorsally by the sacrum, and laterally by the pelvis. Dorsal cavity The smaller of the two main cavities is called the dorsal cavity. As its name implies, it contains organs lying more posterior in the body.bdominal and pelvic cavity The lower part of the ventral (abdominopelvic) cavity can be further divided into two portions: abdominal portion and pelvic portion. The abdominal cavity contains most of the gastrointestinal tract as well as the kidneys and adrenal glands.