Blood, the heart, circulation and respiration

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Question 62
Easy

Figure 1 shows a diagram of a longitudinal section through a human vein.

A diagram showing a longitudinal section of a human vein. The vessel has a wide lumen and a thin wall. Inside the lumen, there is a pair of pocket-like flaps pointing in the direction of blood flow, labelled with the letter Y.

Identify structure Y.

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Blood, the heart, circulation and respiration Questions

  1. GCSE
  2. /Biology
  3. /Blood, the heart, circulation and respiration