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CBSE Class 11-science Answered

insects are having single circulatory system or double circulatory system?
Asked by archana | 13 Jan, 2016, 10:08: PM
answered-by-expert Expert Answer
Insects have an open circulatory system and the cavities and appendages of its body contain fluid,hemolymph. Blood is pumped by the heart and passes through large vessels which open into open spaces called sinuses.
Answered by Sivanand Patnaik | 14 Jan, 2016, 08:26: AM

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CBSE 11-science - Biology
What is likely to  happen if artery of heart gets constricted due to the accumulation of plaque on its inner wall
Asked by kumarhemkunt | 18 Mar, 2021, 11:29: AM
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CBSE 11-science - Biology
question no. 19
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CBSE 11-science - Biology
What is open vascular system  
Asked by yashaschinnu6 | 09 Jan, 2020, 07:57: PM
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CBSE 11-science - Biology
A: elevated levels of sodium Ion increase the heart rate and contact ility R: elevated sodium Ion level increase excitability of s a node
Asked by arushidabhade | 25 Aug, 2019, 02:57: PM
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CBSE 11-science - Biology
A: The resting heart rate about 75 per minutes usually is lower than the autorhythmic rate of SA node (90 to 100 beats per minute) R: at resting condition the parasympathetic effects dominates
Asked by arushidabhade | 25 Aug, 2019, 02:54: PM
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CBSE 11-science - Biology
Why do cardiac muscles never get tired?
Asked by pb_ckt | 28 Apr, 2019, 01:39: PM
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CBSE 11-science - Biology
the right answer in option A but here it is showing option C
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Asked by myschooladviser1 | 12 Feb, 2019, 04:03: PM
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CBSE 11-science - Biology
what will happen if pacemaker is non functional  a. only cardiac muscle will contract rhytically b. the cardiac muscle will not contract in a cordinated manner rhythmically c. cardiac muscle will contract rhythmically in a cordinated manner
Asked by kaintkaku | 02 May, 2018, 08:39: AM
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CBSE 11-science - Biology
Name the two phyla which exhibit the open circulatory system.
Asked by Topperlearning User | 18 Jul, 2014, 02:13: PM
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CBSE 11-science - Biology
Name the germinal layer from which the heart is derived in humans.
Asked by Topperlearning User | 18 Jul, 2014, 02:13: PM
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