The diagram shows a cross-section of part of a vein. What are the first organs reached in directions 1 and 2?
- A1 heart; 2 brain
- B1 intestine; 2 liver
- C1 kidney; 2 heart
- D1 lung; 2 heart
Biology 5090 · O Level · Blood vessels
The diagram shows a cross-section of part of a vein. What are the first organs reached in directions 1 and 2?