What is the central organ of the cardiovascular system in vertebrates?

Padlock

You have reached your daily limit.
Come back tomorrow for more questions!

Today's progress

  • Points won Points 0

  • Correct 0%

  • Answered 0

  • Best streak Streak 0

Learn more!


Source:

  • Choice "A": Lung % of users selected this choice.
  • Choice "B": Heart % of users selected this choice.
  • Choice "C": Skin % of users selected this choice.
  • Choice "D": Kidney % of users selected this choice.
Did you know...
If all the blood vessels of an average adult human were laid out flat; all of our veins, arteries, and capillaries would cover a distance of about 100,000 miles!
Image credit: v2osk.