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Gills -Respiration
Gills are highly vascularised extensions of gas exchange membranes. The simple type may be extension of the body surface as in sea-slugs, sea stars and many of slow moving aquatic animals. The complexity of the gills reflects the animal's requirement for oxygen. Animals with greater need or oxygen have elaborate gill structure. Before we discuss the structure of the gill let us consider the ways in which gills are ventilated because the environment in contact with respiratory surface must be continuously renewed to avoid depletion of oxygen or excessive accumulation of carbon dioxide.
The Period of Persecution: Earlier. treatment of the inentally sick depended on men's various superstitious beliefs. It was thought that sounds and motions are the factors
Rituals: The social life of the earliest human groups or tribes revolved around food gathering. To begin with, they must have collected anything they could eat-seeds, nuts, f
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Q. Why can the amphibian circulation be classified as incomplete and double? The amphibian circulation is double because it is composed of pulmonary and systemic circulations r
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What colors of light are needed in a grow light for strawberry development?
what term is used to indicate its grooves?
Carbohydrate Digestion Simple sugars like glucose and fructose can be absorbed and metabolised directly but disaccharides such as sucrose or lactose and polysaccharides such a
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