Multiple choice

Right atrium of mammalian heart receives blood from __________.

  1. sinus venosus

  2. pulmonary veins

  3. precavals

  4. postcavals

  5. precavals and postcavals
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Three large veins; the right and left anterior venecavae or precavals and a single posterior venecavae or postcaval open by separate pores into the right atium.

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