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Find out the name of the following:
a. A chordate animal having hame cells as excretory structures
b. Cortical portions projecting between the medullary pyramids in the human kidney
c. A loop of capillary running parallel to the Henle’s loopa. a Planaria, (b)-duct of Bellini, (c) Peritubular capillary b. (a) Amphioxus, (b) ollecting duct, (c) vasa recta c. (a)-Lancelet, (b) olumns of Bertini, (c) vasa recta d.  (a) Amphioxus, (b) columns of Bertini, (c) peritubular capillary

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C a. A chordate animal having flame cells‘as excretory structures-Lancelet/Amphioxus/Branchiastoma.
b. Cortical portions projecting between the medullary pyramids in the human kidney-columns of Bertini.
c. A loop of capillary running parallel to the Henle’ s loop-vasa recta.
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verough the atrio-ventricular septa to emerge on the top of the inter. ventricular septum and immediately divides into a right and left bundle. These branches give rise to minute fibres throughout the ventricular musculature of the respective sides and are called purkinje fibres. These fibres alongwith right and left bundles are known as bundle of His. The nodal musculature has the ability to generate action potentials without any external stimuli. 1.c., it is autoexcitable. However, the number of action potentials that could be gienerated in a minute vary at different parts of the nodal system. The SAN can generate the maximum number of action potentials, i.e., , and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called the pacemaker. Qur heart normally beats 70-75 times in a minute (average 72 beats minn ). 18.3.2 Cardiac Cycle How does the heart function? Let us take a look. To begin with, all the four chambers of heart are in a relaxed state, i.e., they are in joint diastole. As the tricuspid and bicuspid valves are open, blood from the pulmonary veins and vena cava flows into the left and the right ventricle respectively through the left and right atria. The semilunar valves are closed at this stage. The SAN now generates an action potential which stimulates both the atria to undergo a simultaneous contraction ñ the afrial systole. This increases the flow of blood into the ventricles by about 30 per cent. The action potential is conducted to the ventricular side by the AVN and AV bundle from where the bundle of His transmits it through the entire ventricular musculature. This causes the ventricular muscles to contract, (ventricular systole), the atria undergoes relaxation (diastole), coinciding with the ventricular systole. Ventricular systole increases the ventricular
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Question Text
Find out the name of the following:
a. A chordate animal having hame cells as excretory structures
b. Cortical portions projecting between the medullary pyramids in the human kidney
c. A loop of capillary running parallel to the Henle’s loopa. a Planaria, (b)-duct of Bellini, (c) Peritubular capillary b. (a) Amphioxus, (b) ollecting duct, (c) vasa recta c. (a)-Lancelet, (b) olumns of Bertini, (c) vasa recta d.  (a) Amphioxus, (b) columns of Bertini, (c) peritubular capillary
TopicHuman Physiology
SubjectBiology
ClassClass 11
Answer TypeText solution:1