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Zorluk: OrtaVertebrates: Homoiothermic Classes (Aves and Mammalia)

In homoiothermic vertebrates, the systemic arch of the heart curves to the left in birds (Aves), whereas it curves to the right in mammals (Mammalia).

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Cevap

False. In birds (Aves), the systemic arch curves to the right, whereas in mammals (Mammalia), the systemic arch curves to the left.
The statement incorrectly reverses the anatomical direction of the systemic arch in birds and mammals. In birds (Aves), oxygenated blood from the left ventricle is distributed to the body via the right systemic arch which curves to the right. In mammals (Mammalia), systemic blood flow passes through the left systemic arch which curves to the left.

Adım Adım Çözüm

1
Identify the anatomical alignment of the main circulatory vessel leaving the left ventricle in homoiothermic vertebrates.
Both Aves and Mammalia possess a four-chambered heart with a single functional systemic arch arising from the left ventricle.
Understanding the evolutionary fate of embryonic aortic arches differentiates the two homoiothermic classes.
2
Determine the direction of curvature of the systemic arch in Aves versus Mammalia.
In birds (Aves), the right fourth aortic arch persists as the right systemic arch curving to the right. In mammals (Mammalia), the left fourth aortic arch persists as the left systemic arch curving to the left.
Comparing these anatomical pathways highlights that the given statement reverses the true orientations.

Anahtar Kavram

Aortic Arch Orientation in Aves and Mammalia
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Konular

Vertebrates: Homoiothermic Classes (Aves and Mammalia)

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