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 [...]
In this article we will discuss about the histology of aurelia, explained with the help of a suitable diagram. a. The ectoderm covers the bell all around. b. The gullet, and the sub-genital pits are also lined by the invaginated epidermis. The epidermis contains epithelial, sensory, nerve, gland cells and cnidocytes. c. The cnidocytes occur on the oral arms, the [...]