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.
Bone Forms Bones in the body are found in two basic forms, long bones and plates. Long bones of this kind are hollow on the inside. The inner space is called the medullary cavity. Bones are also covered by two membranes on the outside of the bone is the Periosteum. The inside of the bone, lining the medullary cavity is the Endosteum. Bone Parts. The Epiphysis refers to the end of the bone, and the Diaphysis refers to the main shaft of the bone. Each Epiphysis is connected to an adjacent bone using a structure called a joint.