In this article we will discuss about the structure of Heart Urchin (Echinocardium) with the help of a diagram. 1. It is commonly known as "heart urchin" and is a marine echinoderm found in shallow waters around coral reefs. 2. Body heart-shaped, some-what ovoid and is having a distinct oral and aboral surfaces. 3. There is neither a central disc [...]
In this article we will discuss about the structure of Sand Dollar (Echinarachinus) with the help of a diagram. 1. It is commonly known as "sand dollar" and is a marine echinoderm found buried in sand at the bottom of sea. 2. Body flattened and somewhat round but without any central disc or arms. 3. Whole body surface is covered [...]
In this article we will discuss about the dissection of Unio. Also learn about: 1. General Anatomy of Unio 2. Dissection of Nervous System of Unio. General Anatomy of Unio: Hold the animal in your left hand with broad anterior end on the left side. With a scalpel scrap the shell margins. Now insert he scaloel blade between two valves [...]