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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

Explain the structure of nephron.

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Question

Explain the structure of nephron.

Answer in Brief
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Solution

Each kidney consists of more than one million nephrons. Nephrons or uriniferous tubules are structural and functional units of the kidneys. Each nephron consists of Renal corpuscle or Malphigian corpuscle and renal tubule. The renal corpuscle consists of a cup-shaped structure called Bowman’s capsule containing a bunch of capillaries called glomerulus.

Blood enters the glomerular capillaries through afferent arterioles and leaves out through efferent arterioles. The Bowman’s capsule continues as the renal tubule which consists of three regions proximal convoluted tubule, U-shaped hairpin loop, the loop of Henle and the distal convoluted tubule. The distal convoluted tubule which opens into the collecting tubule. The

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Chapter 20: Organ Systems in Animals - Exercise [Page 245]

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Samacheer Kalvi Science [English] Class 9 TN Board
Chapter 20 Organ Systems in Animals
Exercise | Q VI. 6. | Page 245

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The figure given below represents a kidney tubule in humans and its blood supply. Study the figure and answer the questions that follow. Write specific name and numbers shown in the diagram for each answer.

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  2. What is the specific name for the combination of parts shown as 5 and 3?
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Assertion A: Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla.

Reason R: Juxta medullary nephrons have short loop of Henle whereas, cortical nephrons have longer loop of Henle.

In the light of the above statements, choose the correct answer from the options given below:


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