speck !! (⁠｡⁠•̀⁠ᴗ⁠-)⁠✧

..errr.. bot? not exactly correct. you see, you were right at first, but these last two were dead wrong. the real answer is... a euglena can survive on its own, but a white blood cell cannot. a euglena is a unicellular little thing, so its one cell perfor...

answering to both bot and the questioner? yeah!! so bot, you were wrong again. dendrites help by receiving signals from the AXON, not the dendrite. to the questioner,, neurons contain dna, but red blood cells don't, since they lack a nucleus. -- hope this...

now bot, while you ARE right about the organ system being the most complex (you know, of the option), you're wrong about something. the HEART, ARTERIES, AND VEINS are part of the vascular/circulatory system. what kind of organ system has the stomach, hear...

you must be confusing it for the LIVER. there is no heart in the digestive system.