In this article we will discuss about the directions for working in a laboratory. 1. Bring complete practical note-book; pencils of "HB" and "B"; pencil eraser and pencil sharpener or blade and sand-paper daily. 2. Keep your instruments, practical notebook and your seat clean, tidy and well arranged. 3. All your instruments should be sharp and according to the requirements. [...]
In this article we will discuss about the anatomy of sycon. L.S. of Sycon: Fig. 93. L.S SYCON 1. Body wall is diploblastic with an outer ectodermal or dermal epithelial layer and inner gastric epithelial layer or endoderm. 2. Non-cellular mesenchyme layer with interspersed monaxon and triaxon spicules is present in between the two layers. 3. The dermal epithelium is [...]
In this article we will discuss about the structure of hydra. This will also help you to draw the structure and diagram of hydra. 1. It is a fresh water form cosmopolitan in distribution. 2. It is found attached to aquatic weeds. 3. Body differentiated into a long tubular trunk and a hypostome or mouth surrounded by a ring of [...]