The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its functions?
Correct answer: A. C -Vena cava- takes blood from body parts to right auricle, pCO 2 = 45 mm Hg
- A. C -Vena cava- takes blood from body parts to right auricle, pCO 2 = 45 mm Hg
- B. D-Dorsal aorta- takes blood from heart to body parts, pO 2 = 95 mm Hg
- C. A-Pulmonary vein - takes impure blood from body parts, pO 2 = 60 mm Hg
- D. B-Pulmonary artery takes blood from heart to lungs, pO2 = 90 mm Hg
Explanation
C -Vena cava- takes blood from body parts to right auricle, pCO 2 = 45 mm Hg. The vena cava is a large vein in humans that carries deoxygenated blood back to the heart. There are two main types: the superior vena cava and the inferior vena cava. The superior vena cava collects deoxygenated blood from the upper body, including the head, neck, and arms, and delivers it to the right atrium of the heart. The inferior vena cava collects deoxygenated blood from the lower body, including the abdomen, pelvis, and legs, and also delivers it to the right atrium. The vena cava plays a crucial role in returning blood to the heart for oxygenation and circulation throughout the body.
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