Biology 0610 · IGCSE · Circulatory systems

Circulatory systems — practice question

Which row indicates the correct features of a fish circulatory system?

  • Anumber of atria: one; number of ventricles: one; number of times blood flows through the heart during one circuit of the body: one
  • Bnumber of atria: one; number of ventricles: two; number of times blood flows through the heart during one circuit of the body: two
  • Cnumber of atria: two; number of ventricles: one; number of times blood flows through the heart during one circuit of the body: two
  • Dnumber of atria: two; number of ventricles: two; number of times blood flows through the heart during one circuit of the body: two

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