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Q. Compared to platyhelminthes which physiological problems have the cylindrical body of nematodes brought? How was that problem solved?
The cylindrical shape of nematodes made impossible the respiration exclusively by simple diffusion among cells since there are tissues far from the external. This problem was solved by the presence of an internal cavity in the body filled with fluid, the pseudocoelom.
The pseudocoelom has the function of distributing nutrients and gases to the body and to collect residuals, besides serving as a hydrostatic base to keep the worm shape. For the fact that the pseudocoelom and the pseudocoelom fluid do not characterize a true circulatory system with blood and heart it is not said that in nematodes the respiration is cutaneous it is considered that these animals still make respiration by diffusion.
Slow Moving Waters - Biota of Rivers The habitat of a slowly moving part of the river is very different from the one just described. Here the water flow is comparatively slow
Which parts of the eye refract ('bend') the light in such a way as to form an image on the retina? The curved surface of the cornea, and the aqueous humour enclosed by it,
vasoconstriction
What is photoperiodism? Photoperiodism is the biological response shown by some living beings to their daily time of light exposure (photoperiod).
where is the inlet and outlet of the diaylsis machine
Explain the Process of Repositioning - Endodontic Surgery 1. Reposition the flap gently, 2. Approximate incision lines closely as possible 3. Pressure application "surgic
Explain Healthy nutrition There is no doubt that adoption of Healthy nutrition lifestyle and the practice of good nutrition habits would help eliminate many health problems ca
what is meant by "pelagic"?
Q. Which are intracellular organelles present in bacteria? Considering typical eukaryotic cell organelles heterotrophic bacteria have ribosomes essential for protein synthesis.
Which of the following is true for active hyperemia, a local control mechanism within the circulatory system? A. There will be an increase in force developed by smooth muscles
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