NUTRITION , DIGESTION IN AMOEBA AND HYDRA
The work consists of the process nitrition in organisms and digestion in Amoeba and Hydra.
Amoebas, single-celled organisms found in freshwater environments, obtain nutrients through a process called phagocytosis. They extend their pseudopodia (temporary projections of their cell membrane) around food particles, forming a vacuole. Inside the vacuole, enzymes break down the food into smaller molecules that can be absorbed by the cell. Waste materials are expelled through a process called exocytosis, where the vacuole containing undigested remnants moves toward the cell membrane and releases its contents outside the cell. This simple yet effective process allows amoebas to survive and thrive in their microscopic world.
Hydra, a freshwater organism, has a simple digestive system. It captures prey using its tentacles and then immobilizes it with toxins. The prey is ingested through the mouth, which leads to a central gastrovascular cavity. Here, both digestion and nutrient absorption occur. The cells lining the cavity release enzymes to break down food particles, and then they engulf smaller particles directly. Waste is expelled through the same opening used for ingestion. This efficient process allows Hydra to obtain nutrients effectively from its prey, supporting its growth and survival in its aquatic environment.
Comments
Post a Comment