Histological Investigations of the Changing Activity of Snails Throughout Their Lives

Abstract

The larger terrestrial mollusc species are cultivated specifically for human consumption. They are now often eaten across the world. Histology has
several applications in animal and human health care. This technique's central value lies in its ability to detect and characterize the existence of
formations and inclusions. It's purpose is to help figure out the make-up and development level of this procedure. Histology is the study of tissue
samples under a microscope. The processed material is next examined and described by the expert in the form of histology preparations.
Consequently, we suggested examining snails using histology. The overall health of snail populations may be determined using this approach. The
research used specimens of the snail species Helix aspersa maxima, Helix aspersa muller, and Helix pomatia. A total of 10 snails from each species were
chosen at four distinct times throughout their active life cycle (immediately after hibernation, 5 days after waking up, 14 days after waking up, and
July). We started with summertime histology investigations of snails since that is when they are most active. Therefore, the experiment's snails were
collected in July. If the snail consumes and lives normally, its digestive gland will have tubules lined with hemolymphatic sinuses and hemocytes,
divided by intertubular connective tissue. Therefore, we focused on the structure of the digestive system in our investigation. Each tubule has a ring of
circular muscular tissue protecting it. The epithelium that lines the digestive gland tubules has three distinct cell types: digestive cells, calcium cells,
and excretory cells. The digestive gland's tubular epithelium is composed almost entirely of digestive cells. Cells in the digestive tract contain circular or
oval nuclei at their bases. During this time, the snail's digestive gland ceases all digestive activity and its cells undergo a metamorphosis into excretory
structures. There is no outward discharge of metabolic byproducts. When they build up, they completely block all passageways throughout a snail's
body, including the lumen of glandular tubules, excretory ducts, the stomach, and the intes- tines. Snails' metabolisms speed up after a meal. It
increases the production of digestive enzymes, the efficiency of the excretory system, and the quantity of waste products. It results in the thorough
flushing out of the digestive system of any waste products that may have built up while the body was at rest. The digestive gland has been fully
restored to its original configuration.