from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Arranged like a net; reticulate.
from The Century Dictionary.
- In anatomy and zoology, retial; like a network or rete in form or appearance; reticular: as, the retiform coat of the eyeball.
- In botany, net-like; reticulate.
from the GNU version of the Collaborative International Dictionary of English.
- adjective Composed of crossing lines and interstices; reticular; netlike.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Having the form of a
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
As in the small intestine, the mucous membrane (Fig. 1082) consists of a muscular layer, the muscularis mucosæ; a quantity of retiform tissue in which the vessels ramify; a basement membrane and epithelium which is of the columnar variety, and resembles the epithelium found in the small intestine.
In many situations a delicate sheath or envelope of branched nucleated connective tissue cells is found around the simple capillary tube, particularly in the larger ones; and in other places, especially in the glands, the capillaries are invested with retiform connective tissue.
It consists of the following structures: next the areolar or submucous coat is a double layer of unstriped muscular fibers, outer longitudinal and inner circular, the muscularis mucosæ internal to this is a quantity of retiform tissue, enclosing in its meshes lymph corpuscles, and in this the bloodvessels and nerves ramify; lastly, a basement membrane, supporting a single layer of epithelial cells, which throughout the intestine are columnar in character.
The essential parts of a villus are: the lacteal vessel, the bloodvessels, the epithelium, the basement membrane, and the muscular tissue of the mucosa, all being supported and held together by retiform lymphoid tissue.
Each consists of a dense interlacing retiform tissue closely packed with lymph-corpuscles, and permeated with an abundant capillary network.
The interspaces of the retiform tissue are continuous with larger lymph spaces which surround the gland, through which they communicate with the lacteal system.
The retiform tissue forms a net-work (Fig. 1060) in the meshes of which a number of leucocytes are found.
It consists of ordinary lymphoid tissue (Fig. 598), being made up of a delicate net-work of retiform tissue, which is continuous with that in the lymph paths, but marked off from it by a closer reticulation; it is probable, moreover, that the reticular tissue of the gland pulp and the lymph paths is continuous with that of the trabeculæ, and ultimately with that of the capsule of the gland.
Running across it are a number of finer trabeculæ of retiform connective tissue, the fibers of which are, for the most part, covered by ramifying cells.