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Counter current flow - Respiration
Each filament has an upper and a lower row of flat lamellae. The lamellae of successive filaments are in close contact. Gas exchange takes place in these lamellae as water flows between them in one direction and blood within them in the other direction. This we call a counter current flow. This type of flow has an important consequence. It permits the fish gills to have the highest possible oxygen levels.
Figure: Counter current flow
The sewage treatment methods can be classified into the following heads: Primary treatment Secondary treatment Tertiary treatment 1. Primary Treatment: The primary
Succession - Community Change The factors like fire, floods and human interventions affect an ecosystem considerably. They often lead to the depletion or stripping off of orig
Radial cleavage - Metazoa Radial cleavage produces tiers or layers of cells one on top of another. Radial cleavage is also said to be indeterminate or regulative because each
Calculate the Concentration of Unknown Solution from Standard Curve? i) First take different volume of standard solution (say 0.2, 0.4, 0.6, 0.8, 1.0 ml) and then calculate the
Describe three ways that RNA differs from DNA. RNA is single stranded; DNA is double stranded all of the codons from the deletion point to the end of the transcript would be s
drawandlabelthemajorendocrineglandsinthehumanbody
Iron deficiency Iron plays an essential role in oxygen transport in the body as a constituent of haemoglobin where nearly 60% of the body iron is found. Apart from oxygen tran
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general charactres and classfication
Define Diagnostic Criteria for Anorexia Nervosa? Table gives the American Psychiatric Association diagnostic criteria for anorexia nervosa. Although the manual does not use bod
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