While the definition of learning disabilities has been the subject of controversy for decades, the current federal classification system identifies three specific areas of deficit: reading, written language, and mathematics and maintains the presumption that the disabilities are a result of a central nervous system dysfunction, in contrast to the ...
These lymph glands can be felt with the fingers at some places like armpits, groin, under the jaw, neck, etc. Lymph nodes are small, bean-shaped organs located in groups, mostly in the neck, armpit, collarbone and groin, which play a major role in the normal functioning of the immune system.
The salt gland is an organ for excreting excess salts. It is found in elasmobranchs (sharks, rays, and skates), seabirds, and some reptiles.Sharks ' glands are found in their rectum, birds' and reptiles' in or on the skull in the area of the eyes, nostrils or mouth.These glands are lobed containing many secretory tubules which radiate outward from the excretory canal at the center. Secretory tubules are lined with a single layer of epithelial cells.he evolution of a salt gland in early reptiles and birds allowed them to eat aquatic plants and animals with high salt concentrations. This evolutionary development does not account for the gland in elasmobranchs, suggesting convergent evolution.