2006-10-27 09:12:27 · 10 answers · asked by jodi27 1 in Science & Mathematics ➔ Zoology
Earthworms have six small pulsating vessels which connect the major dorsal blood vessel to the major ventral vessel, and do circulate the blood, thereby providing the function of a heart in some primitive sense. However, structurally these simple vessels have none of the complex structure seen in hearts of higher animals. No chambers, no valves. The six vessels are not even coordinated in their contractions, but contract independently of one another.
2006-10-27 18:35:19 · answer #1 · answered by PaulCyp 7 · 0⤊ 0⤋
LOL cows have more than one stomach but only one heart, it is earthworms which have multiple hearts...
Excerpt from wikipedia... The dorsal vessel is contractile and pumps blood forward, where it is pumped into the ventral vessel by a series of "hearts" (aortic arches) which vary in number in the different taxa. A typical lumbricid will have 5 pairs of hearts; a total of 10. http://en.wikipedia.org/wiki/Earthworm
2006-10-27 09:31:25 · answer #2 · answered by Kelly + Eternal Universal Energy 7 · 0⤊ 0⤋
a cow has 4 stomachs, an earthworn has 6 hearts
2006-10-27 09:16:49 · answer #3 · answered by corqmaker 2 · 1⤊ 0⤋
i'm pretty sure that a cow has six hearts
2006-10-27 09:20:51 · answer #4 · answered by Skank 4 · 0⤊ 1⤋
i know a cow has six stomachsâº
2006-10-27 09:14:57 · answer #5 · answered by Anonymous · 0⤊ 0⤋
I don't know but that is a really interesting question!
2006-10-27 09:38:06 · answer #6 · answered by Rocio 2 · 0⤊ 0⤋
earthworm
2006-10-27 11:24:41 · answer #7 · answered by Blackcat 2 · 0⤊ 0⤋
earthworm
2006-10-27 11:00:02 · answer #8 · answered by AshleyS. 3 · 0⤊ 0⤋
worm or bull
2006-10-27 09:17:00 · answer #9 · answered by Granny S 1 · 0⤊ 0⤋
it is a worm, i think
2006-10-27 09:15:07 · answer #10 · answered by garrbear99 1 · 1⤊ 0⤋