How many "hearts" does an earthworm have?
Earthworms do not have a multichambered heart like mammals or reptiles but instead have a series of single-chambered aortic arches, or "psuedohearts," that pump blood through the circulatory system. Some biologists argue that these structures are indeed hearts, but whether they can be considered true hearts or not, the average earthworm has five of these circulatory-system structures arranged consecutively.
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What are your thoughts on this subject?
28 Comments
Mic Fenst
Dissected one in HS biology. Have not forgotten.
Christine Gardner
Technically they don't have a heart
osborntd
I understand that if you cut the worm in 5 pieces , 4 will grow the full length, the 5th only half, And I Do Not know which End is the 5th.
dmarkc
Answer depends on the author's opinion, well-known only to himself.
Chris Brown
Partly correct. I looked it up after answering your question and found the following:
www.quickscientist.com › how-many-hearts-does-an-earthworm-haveHow Many Hearts Does An Earthworm Have? - quickscientist.com
Jun 27, 2023, · Depending on the definition of “heart,” earthworms can be said to have either 10 or zero hearts. How Earthworm Hearts Pump Blood? Earthworm hearts are still able to efficiently pump blood around the body,
Deborah Gabriel
Wow, I didn't know that. Good trivia!
earlepg
From this explanation, I would have expected the answer to have been 0.
earlepg
earlepg, {to continue what I was saying} , certainly never my cup of tea.
earlepg
Marcella Kosse, Unfortunately, for some, it is interesting, if not fun
Coral Harvey
Sounds like a sequence of valves designed to push the blood flow along remembered it was five hearts !
Player
My heart was not in this question.
Flavio
Pseudohearts, not psuedohearts.
kamaker
Should say worms
kamaker
Joan Scott-Lange, ...works can't have human hearts...many animals and organisms have different looking hearts...not trying to be rude...
kamaker
Christine Gardner, ...we know my friend...the explanation stated they are aortic arches
kamaker
Science/ biology helped me
Oscar Lewallen
Christine Gardner, that is a “heartless” comment. 😂