I believe proteins would be the correct answer, but of course I just learnt this stuff 2 weeks ago. xD
Because it carries a lot of blood to the arteries
Have you ever watched a caterpillar turn into a butterfly? If so, you're probably familiar with the idea of alife cycle<span>. Butterflies go through some fairly spectacular </span>life cycle<span> transitions—turning from something that looks like a lowly worm into a glorious creature that floats on the breeze. Other organisms, from humans to plants.</span>
Which Question do you need help with?
