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 [...]
In this article we will discuss about the structure of aurelia, explained with the help of a suitable diagram. a. The body consists of a gelatinous disc with a slightly convex ex-umbrella (Fig. 20.17) and bears a four-cornered mouth on a short manubrium guarded by four oral arms at the centre of the sub-umbrella. b. The margin bears a [...]
The upcoming discussion will update you about the difference between obelia and aurelia. Difference # Obelia: A. Medusa: 1. It has a small size, often called swimming bell and the medusa is produced by budding from blastostyles of polypoid obelia colony. 2. Medusa phase is reduced. 3. The bell margin is entire and is provided with few long, solid tentacles. [...]