The given figure shows the schematic plan of blood circulation in humans with labels A to D. identify the label and give its functions.
C – Vena cava – takes blood from body parts to right auricle, pCO2 = 45 mm Hg
D – Dorsal aorta – takes blood from heart to body
parts, pO2 = 95 mm Hg
A – Pulmonary vein – takes impure blood from body parts, pO2 = 60 mm Hg
B – Pulmonary artery – takes blood from heart to lungs, pO2 = 90 mm Hg
For the schematic circulation question, the correct option is a. C – Vena cava – takes blood from body parts to right auricle, pCO2 = 45 mm Hg
Here is a detailed breakdown of that question and some new "clone" practice sets for your NEET 2026 prep.
Detailed Analysis of the Circulation Schematic
A (Pulmonary Vein): Carries oxygenated blood (95 mm Hg) from the lungs to the left atrium. Option 'c' is wrong because it calls it "impure."
B (Dorsal Aorta): Carries oxygenated blood from the left ventricle to the systemic tissues. Option 'd' is wrong because it labels this as the pulmonary artery.
C (Vena Cava): Carries deoxygenated (impure) blood from tissues to the right atrium. The partial pressure of CO2 (pCO2) in deoxygenated blood is 45 mm Hg. (Correct Match).
D (Pulmonary Artery): Carries deoxygenated blood from the right ventricle to the lungs. Option 'b' is wrong because it labels this as the dorsal aorta.
In the given figure of the heart, which f the marked structures (1, 2, 3, 4, 5)
NextCardiac activities of the heart are regulated by:A. Nodal tissueB. A special neu
Which of the following statements regarding the human heart is incorrect?
MediumCardiac activities of the heart are regulated by:A. Nodal tissueB. A special neural centre in the me
MediumIn the given figure of the heart, which f the marked structures (1, 2, 3, 4, 5) carry oxygenated blo
MediumIdentify the given figure and select the correct option.
MediumCongestion of the lungs is one of the main symptoms in:
MediumSudden damage of heart muscle due to inadequate blood supply is called:
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