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How are the excretory systems of the three main arthropod classes constituted?
In crustaceans a pair of excretory organs known as green glands exists. The green glands collect residuals from the blood and other parts of the body. They are linked by ducts to excretory pores located under the base of the antennae and these pores release the excretions outside.
In insects small structures known as malpighian tubules gather wastes from the blood and throw them into excretory ducts that open in the intestine. In these animals excretions are eliminated together with feces.
First Stage of Invagination The large endodermal cells that are remaining in the vegetal plate move laterally towards the centre of the plate and fill the gap in the vegetal
Q. Describe the Non Direct Approach? The counsellor's participation is minimal; here the counsellee freely expresses. The counsellor pays attention to the emotion and attitudes
Risk Characterization Risk Characterization : Integration of hazard identification, hazard characterization and exposure assessment into an estimation of the adverse e
Illustrate about the metabolic waste products in the cornea? Metabolic Waste Products During the metabolism various waste products including lactic acid, protein an
What are plant root hairs? Where can they found and what is their function? The Root hairs that are external elongated projections of the root epidermis and their role is to in
What is Atraumatic needles Atraumatic needles with sutures comprise an eyeless needle attached to a specific length of suture thread. There are several shapes of surgical n
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Light and Distribution We have mentioned in the beginning that the variation in the amount of light generally affects the global and local distribution of plants and animals. L
Effect of Environmental Factors some lower organisms, though the genetic determiners of the sexes are present, the ambient environment plays a decisive role in the development
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