How Biomphalaria Glabrata Is A Freshwater Snail That Originates From Central And South America

929 Words Jun 5th, 2015 4 Pages
Biomphalaria glabrata is a freshwater snail that originates from Central and South America. The NMRI strain of Biomphalaria glabrata exhibits albinism. The snails’ albinism makes them transparent, which provides the opportunity to observe their circulatory anatomy and physiology. They lay eggs in masses, with 2-30 eggs per mass. The eggs go through several developmental stages. First, they are fertilized. Each egg contains a single embryo, which then begins to grow. Each embryo measures approximately 100 µm in diameter when it first begins to grow (Magalhães et al. 2003). The embryo reaches the blastula stage between 10 to 23 hours after the eggs are laid (Mitasato et al. 2012). From here, the snails grow rapidly, and by the third day have grown much larger. After five days of development the snails have grown, and are able to leave the shell. (Bielefeld and Becker, 1991) Once the snails have developed through the embryo stage they go through eclosion, which is when they leave the egg. By the fifteenth day the snails are completely past the embryo stage and are now juveniles.
Neurotransmitters are chemicals that communicate information between cells. They are very important to the circulatory system and have strong effects on the body as a whole. Biogenic amines and their receptors have been found to regulate and modulate many physiological and behavioral processes in animals. In vertebrates, octopamine is only found in trace amounts and its function as a true…

Related Documents