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Explain the Rectum and Anal Canal
Rectum: This is a slightly dilated part of the colon. It leads from the pelvic colon.
Anal canal: This is a short canal which leads from the rectum, to the exterior. There are two sphincter muscles which control the anus. The internal sphincter consists of smooth muscle fibre and is under the control of autonomic nervous system. The external sphincter is formed by striated muscle. It is under voluntary nerve control.
Release of Energy : When the atom splits, the masses of the fragments and the neutrons produced do not add up to the mass of the original. A tiny amount of matter disappears. Th
Explain Neutrophils They form about 50-70% cells. They have fine dust like particles in the cytoplasm which stain purplish. Tissues, cells damaged by the invading microbes rele
Explain the Small Intestine The small intestine is continuous with the stomach at the pyloric sphincter and leads into the large intestine at the ileocdic valve. It is about 2
Why are nematodes agriculturally very important? Nematodes are the abundant soil microfauna. Being predatory and saprophytic in nature they cause a loss of vigour of the root
You can observe the buoyancy of water Make an equivalent arm balance. Secure two soda water-bottles and suspend them with loops of string from either side of the arm. Unless th
what is the nature of work when you are a zoologist
QUESTION a) Is Psychology a science? Explain with an appropriate definition b) How does the knowledge of psychology help you deal with people in your everyday life? c) Desc
What are the Disadvantages of Alkaline Soils As most of the plants can assimilate nitrogen in its nitrate form, and oxidation of ammonium fertilizer can take place only in acid
Emergence of chemistery: Chemistry The level of chemical knowledge and practices in the new ordered society is reflected in the pottery, iron tools and glass objects found at
Water-mill in Golden era: The water-mills were also invented in the classical period. But they came to be widely used only in the Middle Ages. The wind-mills and water-mills
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