human's After oxidation, the blood from the marginal channels returns to the median channel and then to the outgoing (efferent) gill vessels, which transmit it to the heart. In this article we will discuss about the Respiration in Prawn:- 1. Locomotion 4. A prawn has 5 pairs of walking legs (located on thorax) and 5 pairs of swimming legs (located on the abdomen) . ADVERTISEMENTS: In this article we will discuss about:- 1. gallbladder color is black . The side channels are interconnected through several transverse channels (Fig. In this lining, gaseous exchange takes place between the blood lacunae and surrounding water. TOS4. One pair of pleopods is present in each of the first five abdominal segments. The base of each fifth walking leg contains a small opening, called male gonopore, through which the seminal vesicle of the corresponding side opens. Advertising on our site helps support our mission. This filter plate together with the bristles on the lateral wall of ventral chamber, acts as pyloric filtering apparatus. The portion of the carapace covering the gills are called branchiostegite or gill cover. 25.5). Required fields are marked *. These cookies track visitors across websites and collect information to provide customized ads. The sternal artery is a large vessel. According to their position and mode of attachment, the gills are of three types: (i) Podobranchattached with the coxa of the second maxilliped. Our mission is to provide an online platform to help students to discuss anything and everything about Zoology. 4. The appendages are jointed in all arthropods (Figs. The respiratory system is made up of airways, tissues and organs that allow a person to breathe. From the ventral sinus six afferent branchial channel take the deoxygenated blood to the gills. The exopodite is longer than the endopodite. Excretory organs of Prawn are known as green glands or antennal glands (Fig. The body of Prawn is elongated, hemispherical and slightly tapering at the posterior end (Fig. endstream endobj 97 0 obj <. A small ganglion is present in each commissure to supply nerve to the mandibles. In bright light, the pigment sheath is extended and any jay, of light which falls obliquely on the ommatidium is absorbed by the pigment sheath. The labyrinth walls are folded and glandular which are considered as the site of selective reabsorption. They are present along the margins of the appendages, abundant in antennae and flattened portion of pleopods. You also have the option to opt-out of these cookies. Respiration in Arthropoda | Zoology for IAS, IFoS and other competitive Protopodite small, the exo-and endopodite are broad and oval. The bladder occupies the innermost region and is drawn into a narrow tube to open to the exterior through the renal aperture on the inner side of the coxa. Breeding and Life-History. Bronchiectasis. Excretory System 8. 25.1). 25.4) of Prawn: Six pairs; each pleopod consists of a two-jointed protopodite bearing expodite and endopodite. This cookie is set by GDPR Cookie Consent plugin. 13 pairs of paired, biramous appendages are present in the cephalothorax. Nervous System 10. Each gill- plate is formed by monolayer of cells, sand- witched between two layers of cuticle. Your email address will not be published. The two basal segments represent the coxopodite and basipodite and the remaining five are ischium, merus, carpus, propodus and dactylus, respectively, in order of succession. 10. The process of nutrition involves three stagesingestion, digestion and egestion.
