Read this article in Hindi to learn about the structure of a sponge, explained with the help of a suitable diagram. पहचान एवं वर्गीकरण: यह एक सरल रचना वाला समुद्री स्पंज है । इसका वर्गीकरण निम्नानुसार है: जगत - जन्तु-जगत् (बहुकोशिकीय, विषमपोषी) संघ - पोरीफेरा (छिद्रित शरीर, ऊतक नहीं) वर्ग - कैल्केरिया (कंटिकाएँ CaCO3, की बनी हुई) वंश – ल्युकोसोलेनिया [...]
In this article we will discuss about the spicules and gemmule of sponge. Spicules of Sponge: 1. The spicules are structures which form the supporting skeleton in sponges. 2. They may be either calcareous or silicious in nature. 3. They may be either monaxon (having one ray) triaxon (having 3 rays) or tetraxon (having 4 rays). 4. Some times they [...]
In this article we will discuss about Brachiopoda:- 1. Shape and Symmetry of Brachiopoda 2. Structure of Brachiopoda 3. Body Wall 4. Body Cavity 5. Muscular System 6. Digestive System 7. Respiratory System 8. Circulatory System 9. Excretory System 10. Nervous System 11. Reproductive System 12. Development 13. Affinities Shape and Symmetry of Brachiopoda: Brachiopoda are marine animals with a [...]