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Annelids and chordates have a closed circulatory system in which the blood pumped by the   (heart/lungs/gills) is always circulated through a closed network of blood vessels.

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Important Questions on Body Fluids and Circulation

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
What is excretion? Name two excretory organs in humans.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Define excretion.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System

The kidneys in human beings are a part of the system for:

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
How do parasympathetic neural signals affect the working of the heart?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
What is excretion? Name any two nitrogenous wastes products.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Match the items given in Column I with those in Column II and select the correct option given below:
 
  Column – I   Column – II
a. Tricuspid valve i. Between left atrium and left ventricle.
b. Bicuspid valve ii. Between the right ventricle and pulmonary artery.
c. Semilunar valve iii. Between the right atrium and right ventricle.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Excretory organs present in annelids
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Correct course of blood circulation in human heart.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Blood pressure in the pulmonary artery is:
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System

Removal of wastes from the body is called _____.

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Which one of the following animals has two separate circulatory pathways?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
What is excretion?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Name the structures that help in excretion in tapeworm, earthworm, cockroach and human beings.
MEDIUM
Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
What is excretion? Explain
(i) excretion in Amoeba.
(ii) excretion in Earthworm.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Blood pressure in the mammalian aorta is maximum during
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
The hepatic portal vein drains blood to the liver from
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
In mammals, which blood vessel would normally carry the largest amount of urea?
MEDIUM
Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
What is the nature of blood passing through the blood vessels A, B, C and D respectively?
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HARD
Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
The figure shows a schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s.
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