2007-07-09 11:38:09 · 3 answers · asked by Lauren P 1 in Science & Mathematics ➔ Biology
That's true. Insects do not have a heart/blood vessel circulatory system.
The reason for this is their small size. Oxygen diffuses quickly enough through the insect's tiny body that there's no reason to pump the blood around. A human is far too large for oxygen diffusion to be enough to keep them alive, so they need a heart to keep the blood moving.
2007-07-09 11:41:57 · answer #1 · answered by lithiumdeuteride 7 · 0⤊ 0⤋
I don't belong to any organized religion. Never have and never will. For me the true heaven or hell is the one we live in our souls while we are alive. A person who acts wrong and is immoral and acts badly.... is his own worse punishment. What happens after physical death... that is a mystery and a matter of faith for all of us. No one has come back to tell us about it. For me, God, the higher creature, whatever you or the rest of mankind might call it.... I think is above all that personal stuff, busy with other things much more important that our sins or the way we live our existence. I believe we all know what is wrong and wright and we educate our children accordingly. We have the power to choose. We know why we do it. My kids were raised that way and they have accepted all the important social and moral values, regardless of their not belonging to any church, but out of true understanding not out of fear of hell. I have never in my life threatened my kids with hell or things like that and who ever does such a thing is a moron. If anyone would take the time and the affection to sit with his kids and EXPLAIN things truly.. . use the power of education and love.....I am sure kids are like sponges and can be good persons later on because they want to, not because they are afraid.
2016-05-21 22:58:44 · answer #2 · answered by annalisa 3 · 0⤊ 0⤋
Yes it's true..but its not called blood. The fliud is referred to as Haemolymph and appears white.
2007-07-10 07:06:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋