Question 19
Transport in AnimalsBlood is pumped into the right ventricle by the contraction of the auricle wall through

- A.1
- B.3
- C.5
- D.6
Show the answer and explanation
Answer: B (3)
Explanation
Label 3 is at the opening between the right auricle and right ventricle (the tricuspid valve region), through which blood passes when the auricle contracts.