Please help - Chambered Hearts Questions

[nguyenkimphat]

Hello 🙂

I was wondering - on the DAT there are many questions about the chambered hearts of animals. Could someone please summarize the common animals and their number of heart chambers on this thread please? Can someone give me a list of all the different animals and their chambered hearts?

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[hope_to_match]

Hello 🙂

I was wondering - on the DAT there are many questions about the chambered hearts of animals. Could someone please summarize the common animals and their number of heart chambers on this thread please? Can someone give me a list of all the different animals and their chambered hearts?

I think it's important to look at Deuterostomes and compare their heart structures as that is when a fully functional circulatory system developed. Specifically for chordates. Chordates include invertebrates (urochordata and cephalochordata) and vertebrates (vertebrae as the name implies). I think the most important comparison in heart chambers would be within vertebra. So here it is:

Terrestrial vertebra animals consist of the following classes ( 1 being the most primitive)
1. Amphibians: 3 chambered heart (atria and 2 ventricles)
2. Reptiles (3 chambered heart: atria and 2 ventricles but we start to see the atria splitting)
3. Aves (i.e. birds) (4 chambered heart)
4. Mammals (4 chambered heart)

Also, note that fish that came before amphibians are aquatic vertebra and have a 2 chambered heart. You can see the trend (most primitive 2 chambered- to mammals/ birds 4 chambered)

Hope this helps. 🙂

 

[gn4]

I think it's important to look at Deuterostomes and compare their heart structures as that is when a fully functional circulatory system developed. Specifically for chordates. Chordates include invertebrates (urochordata and cephalochordata) and vertebrates (vertebrae as the name implies). I think the most important comparison in heart chambers would be within vertebra. So here it is:

Terrestrial vertebra animals consist of the following classes ( 1 being the most primitive)
1. Amphibians: 3 chambered heart (atria and 2 ventricles)
2. Reptiles (3 chambered heart: atria and 2 ventricles but we start to see the atria splitting)
3. Aves (i.e. birds) (4 chambered heart)
4. Mammals (4 chambered heart)

Also, note that fish that came before amphibians are aquatic vertebra and have a 2 chambered heart. You can see the trend (most primitive 2 chambered- to mammals/ birds 4 chambered)

Hope this helps. 🙂

I believe Crocodiles are the only reptiles with 4 chambered hearts.

 

[experiment626]

Lol I think I had a question about this on my actual DAT. Better know them just in case!

 

[jHoon]

According to #421 George Bush has a notochord. That might be on the DAT so be careful.

 

[hope_to_match]

EDIT: Amphibians have 3 chambered which is 2 atria and 1 ventricle.

Reptiles - 3 chambered (2 atria and 1 ventricle and the ventricle is partially divided). All other info is correct!

And yeah crocs are the only reptiles (i think) that have a 4 chambered heart

 

[Glimmer1991]

Experiment626--you can't post that! 🙂