Circulation of Body Fluids — Important Questions
Telangana Open School (TOSS) · Class 12 · Biology
48 important questions from Circulation of Body Fluids for Telangana Open School (TOSS) Class 12 Biology, with answers. Written for the board exams 2027.
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Important Questions from Circulation of Body Fluids
Which valve prevents backflow of blood from the left ventricle to the left atrium?
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Bicuspid valve
The bicuspid (mitral) valve guards the left atrioventricular aperture and prevents backflow into the atrium.
What is the average cardiac output in a healthy adult?
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5040 ml/min
Cardiac output = Stroke volume (70 ml) × Heart rate (72 beats/min) = 5040 ml/min.
Which type of circulatory system is found in arthropods?
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Open
Arthropods have an open circulatory system where blood flows into body cavities called sinuses.
Which chamber of the heart receives oxygenated blood from the lungs?
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Left atrium
The left atrium receives oxygenated blood from the lungs via pulmonary veins.
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