Q.Name and Label the given diagrams to show A, B, C, D, E, F, and G

Step 1. Use vessel shape to find the aorta (A). The topmost arrow (A) points to the distinctively arching pink vessel at the top of the heart — this curved shape is characteristic of the arch of the aorta, the large artery that carries oxygenated blood out to the whole body, which is why it is coloured red/pink (oxygenated blood).

Step 2. Identify the vessel next to it (B). Immediately beside the aorta, also emerging from the top of the heart but coloured blue (deoxygenated blood), is the pulmonary artery/trunk — the only artery in the body that carries deoxygenated blood, on its way to the lungs for gas exchange.

Step 3. Locate the vessel entering the right atrium from above (C). A blue vessel entering the upper part of the right (blue-shaded) side of the heart is the superior vena cava, which returns deoxygenated blood from the head, neck and upper limbs to the right atrium.

Step 4. Locate the vessel entering the left atrium (D). A vessel on the red/pink (oxygenated) side of the heart, entering at a similar level, is the pulmonary vein, which is unusual in carrying oxygenated blood from the lungs back into the left atrium.

Step 5. Identify the chambers (E and F). The upper chamber on the blue side is the right atrium (E), which receives deoxygenated blood from the venae cavae. The thick-walled chamber on the red/pink side lower in the drawing is the left ventricle (F), the most muscular chamber, which pumps oxygenated blood into the aorta to the whole body. …

Use the colour-coding (blue = deoxygenated, red/pink = oxygenated) together with each label's position at the top, middle, or bottom of the heart drawing (great vessels emerge from the top of the heart; the superior vena cava enters the t …

• Confusing the pulmonary artery (deoxygenated blood leaving the heart for the lungs) with the aorta (oxygenated blood leaving the heart for the body), since both emerge from the top of the heart
• Confusing the pulmonary vein (oxygenated, entering the left atrium) with the venae cavae (deoxygenated, entering the right atrium), since 'vein' is often wrongly assumed to always carry deoxyg …