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.
Ventral body cavity. -thoracic cavity: chest cavity containing heart and lungs. -abdominal cavity: contains digestive, excretory, and reproductive organs. Two cavities separated by diaphragm, which is crucial for breathing. Ventral Body Cavity contains: Thoracic Cavity which contains: Right Pleural Cavity, Mediastinum, Pericardial Cavity, and Left Pleural Cavity.