In the labels a - d of blood circulation, identify the label that gives correct function(s).

d - Dorsal aorta - takes blood from heart to body parts,

p O_{2}

= 95 mm Hg

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a - Pulmonary vein - takes impure blood from body parts,

p O_{2}

= 60 mm Hg

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b - Pulmonary artery - takes blood from heart to lungs,

p O_{2}

= 90 mm Hg

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c - Vena cava - takes blood from body parts to right auricle,

p C O_{2}

= 45 mm Hg

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Solution

The correct option is D c - Vena cava - takes blood from body parts to right auricle, $p C O_{2}$ = 45 mm Hg
In the given diagram:
a represents pulmonary vein which carries oxygenated blood from the lungs to left auricle of heart. Partial pressure of oxygen pO₂ in pulmonary vein is 95 mm Hg.
b represents dorsal aorta which carries oxygenated blood from left ventricle to body tissues. Partial pressure of oxygen pO₂ in dorsal aorta is 95 mm Hg.
c represents vena cava which carries deoxygenated blood from the body parts to right auricle. Partial pressure of carbon dioxide pCO₂ in vena cava is 45 mm Hg.
d represents pulmonary artery which carries deoxygenated blood from right ventricle of heart to the lungs. Partial pressure of carbon dioxide pCO₂ in pulmonary artery is 45 mm Hg.
Hence, label c shows the correct function.
So, the correct answer is 'c - Vena cava - takes blood from body parts to right auricle, pCO₂ = 45 mm Hg'

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Similar questions

Q. Draw the diagram of human heart and label the following parts which
(i) receives deoxygenated blood from vena cava,
(ii) send deoxygenated blood to lung through pulmonary artery,
(iii) receives oxygenated blood from lungs and
(iv) sends oxygenated blood to all parts of the body through aorta.

Match the parts of the heart in Column I with the direction of flow of blood in Column II
$\begin{matrix} C o l u m n I & C o l u m n I I (i) R i g h t V e n t r i c l e & (a) P u m p s d e o x y g e n a t e d b l o o d i n t o t h e p u l m o n a r y a r t e r y (i i) P u l m o n a r y V e i n s & (b) T a k e s d e o x y g e n a t e d b l o o d (i i i) L e f t A t r i u m & (c) R e c e i v e s b l o o d f r o m d i f f e r e n t p a r t s o f t h e b o d y . (i v) P u l m o n a r y A r t e r i e s & (d) B r i n g o x y g e n a t e d b l o o d f r o m l u n g s t o t h e h e a r t . (v) L e f t V e n t r i c l e & (e) P u m p s b l o o d i n t o t h e a o r t a . (v i) R i g h t A u r i c l e & (f) R e c e i v e s d e o x y g e n a t e d b l o o d f r o m t h e p u l m o n a r y v e i n s . \end{matrix}$

Q. Blood from the lungs enters the heart through the
(a) pulmonary artery
(b) pulmonary vein
(c) aorta
(d) vena cava

Q. Match the following

\begin{matrix} Column I & Column II 1.Aorta & i. Carries deoxygenated blood from upper part of the body to the heart 2.Inferior vena cava & ii. Carries oxygenated blood from the lungs to heart 3.Superior vena cava & iii. Carries oxygenated blood from the heart to the other parts of the body 4.Pulmonary vein & iv. Carries deoxygenated blood from lower part of the body to the heart \end{matrix}

Q. Which of the following statement(s) wrong with regard to heart?
A. Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.
B. Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
C. Left atrium receives oxygenated blood from lungs while left ventricle pumps oxygenated blood to different parts of the body.
D. Pulmonary vein carries deoxygenated blood to the lungs and pulmonary artery brings oxygenated blood towards the heart.

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