Excretory Organs of Arthropods - Biology Discussion.
Arthropods are very highly cephalized, often with intricate mouthparts and elaborate sensory organs, including statocysts, antennae, simple eyes and compound eyes. Sensitive hairs on the surface of the body can detect touch, water currents, or chemicals. Their nervous systems are highly developed, with chains of ganglia serving various parts of the body, and three fused pairs of cerebral.
Phylum Arthropoda and its various groups have been classified differently by different workers. But the classification of Arthropoda followed in the present text is generally based on vandal (1949), Snodgrass (1960) and Storer (1979). Onychophora, however, was considered to be arthropod for a long time but the modern trend is to consider it as an independent group of segmented animals.
The basic annelid form consists of multiple segments. Each segment has the same sets of organs and, in most polychates, has a pair of parapodia that many species use for locomotion. Septa separate the segments of many species, but are poorly defined or absent in others, and Echiura and Sipuncula show no obvious signs of segmentation.
An internal circulatory system transports essential gases and nutrients around the body of an organism, removes unwanted products of metabolism from the tissues, and carries these products to specialized excretory organs, if present. Although a few invertebrate animals circulate external water through their bodies for respiration, and, in the case of cnidarians, nutrition, most species.
A respiratory pigment is a molecule which increases the oxygen carrying capacity of blood. Learn more about the most common respiratory pigment in mammals, hemoglobin, as well as how it works.
The respiratory organs are composed of a complex system of air tubes, or tracheae, which end in minute capillary tracheoles. Air enters the tracheal system through spiracles in the sides of the body and reaches the tissues and cells of the body directly. The excretory organs consist of Malpighian tubules, which remove waste products. The development of insects and many of their life processes.
The Phylum Hemichordata. Etymology:-From the Greek Hemi for half and the Latin Chorda a chord. Characteristics of Hemichordata:-1)Bilaterally symmetrical. 2)Body has more than two cell layers, tissues and organs. 3)Body cavity a true coelom. 4)Body possesses a through gut, straight or U-shaped, with an anus. 5)Body divided into three sections, a proboscis, a collar and a trunk. 6)Nervous.