2007-07-12 04:49:08 · 12 answers · asked by Nanda K 1 in Science & Mathematics ➔ Zoology
Do you mean two types of heart?
In vertebrates, take the case of frog.It has lymph hearts and and normal blood pumping heart.
If you take blood pumping heart into to consideration, then fish have single heart(with one atrium and one ventricle).
Crocodiles, birds, and mammals have double heart( heart with two atria and two ventricles).
In invertebrates, take the case of an earthworm.
It has lateral hearts and laterooesophageal hearts.
In sepia, there are branchial hearts and ordinary blood pumping heart.
2007-07-16 01:19:22 · answer #1 · answered by Ishan26 7 · 1⤊ 0⤋
Fish Two Hearts
2016-12-15 11:58:26 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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Fish have 2 chambers, one atrium and one ventricle. The fish heart (figure 1a) is much different than the amphibian/reptile/bird/mammal heart (figures 1b and c). Hearts are very complex--they're not just a bunch of random arteries and veins connecting tissue. Fish hearts simply draw in deoxygenated blood in a single atrium, and pump it out through a ventricle. This system is termed "single circulation", as blood enters the heart, gets pumped through the gills and out to the body, Blood pressure is low for oxygenated blood leaving the gills. see web page for diagrams and more ...
2016-04-11 06:54:07 · answer #3 · answered by Deborah 4 · 1⤊ 0⤋
A Squid
2007-07-15 05:00:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
A squid has two hearts.
2007-07-15 19:43:22 · answer #5 · answered by Himadrisekhar S 3 · 0⤊ 0⤋
squid has 2 hearts
2007-07-12 05:32:36 · answer #6 · answered by srk93 3 · 1⤊ 0⤋
A squid has two, an octopus has three, an earthworm can have four or five, and a cockroach has 13!
2007-07-12 04:58:18 · answer #7 · answered by raspberrytart 4 · 2⤊ 0⤋
the squids & fish have two gill hearts-- an atrium & a ventricle.
2007-07-12 04:58:58 · answer #8 · answered by kanya 5 · 0⤊ 1⤋
animals including human, which/who is falling in LOVE...
2007-07-12 04:57:49 · answer #9 · answered by shiva 1 · 0⤊ 1⤋
squid.
this link will tell you everything you want to know:
http://en.wikipedia.org/wiki/Squid#Cardiovascular_system
2007-07-12 04:53:58 · answer #10 · answered by Anonymous · 1⤊ 0⤋