Respuesta :
Answer:
Land vertebrates developed lungs, a new vein (the pulmonary vein) to take blood from them to the heart, and a double circulation, whereby the heart is effectively divided into two halves—one-half concerned with pumping incoming deoxygenated blood from the body to the lungs and the other with pumping oxygenated blood .
Explanation:
Land vertebrates developed lungs, a new vein (the pulmonary vein) to take blood from them to the heart, and a double circulation, whereby the heart is effectively divided into two halves—one-half concerned with pumping incoming deoxygenated blood from the body to the lungs and the other with pumping oxygenated blood.
What are vertebrates?
All vertebrates are chordates, but not all chordates are vertebrates. Both vertebrates and chordates show presence of pharyngeal gill slits, a nerve cord, and a post-anall tail in some stages of their life.
Thus, incoming deoxygenated blood from the body to the lungs and the other with pumping oxygenated blood.
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