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How many aortic arches does a earthworm have?
aortic arches is another term for heart, and an earthworm has 5.
Why is the earthworms hearts not considered to be true hearts?
The hearts that worm's have are very different from the heart's that humans have. The worm equivalent of a heart is called the aortic arch and does not contain chambers or valves, and does not get oxygen-rich blood to the lungs. The aortic arches simply pump blood throughout the worm's body.
Why does the earthworm belong to the phylum anneldia?
The annelids are segmented worms. Although some annelids have appendages and primitive sight organs (photo-reactive pigment spots), earthworms do not. Earthworms do, however, have the typical annelid neural ganglia, and the annelid circulatory system, including the aortic arches that function as the worm's heart. And, of course, earthworms are segmented.
How can a earth worm have hearts?
There are actually 5 hearts in an earthworm. Correction: They technically aren't hearts they are considered aortic arches
What heart valve is located between the left ventricle and the aorta?
the aortic valveThe Aortic valveThe aortic semilunar valve lies between the left ventricle and the aorta.
