In this article we will discuss about the structure and life history of elphidium, explained with the help of suitable diagrams. Structure of Elphidium: 1. The shape of the animal is more or less round. 2. It is surrounded with a many-chambered, mullilocular and perforate calcareous shell consisting of 45 to 50 chambers. 3. The, chambers are boat-shaped and spirally [...]
In this article we will discuss about:- 1. Genus of Euglena 2. Structure of Euglena 3. Locomotion 4. Nutrition 5. Reproduction. Genus of Euglena: The Euglena is an acellular, fresh water organism placed in the order Euglenida, class Phytomastigophora, subphylum Mastigophora, phylum Sarcomastigophora, subkingdom Protozoa. The genus Euglena comprises probably about fifty species and they vary considerably in shape, size [...]
In this article we will discuss about the sense organs in aurelia, explained with the help of a suitable diagram. i. Sense Organs: The sense organs include the olfactory pits, the ocelli and the tentaculocysts or rhopalia. ii. Olfactory Pits: Two, lined with sensory epithelium—one lie on the ex-umbrella and the other in the sense club. These are chemoreceptors and [...]