A major evolutionary advancement in the circulatory system of birds and mammals compared to amphibians is the complete separation of oxygenated and deoxygenated blood. Which structural feature of the heart is directly responsible for preventing the mixing of oxygenated and deoxygenated blood in mammals?
- A completely divided four-chambered structure with an intact inter-ventricular septumCevap
- BA three-chambered arrangement with a single undivided ventricle
- CA two-chambered configuration with one atrium and one ventricle
- DA three-chambered heart featuring a partially divided ventricle
Cevap
A completely divided four-chambered structure with an intact inter-ventricular septum is directly responsible for preventing the mixing of oxygenated and deoxygenated blood in mammals.
The mammalian heart has four distinct chambers (two atria and two ventricles). The muscular inter-ventricular septum completely divides the ventricular cavity into left and right sides, ensuring oxygenated blood from the lungs and deoxygenated blood from the body remain entirely separate.
Adım Adım Çözüm
Anahtar Kavram
Vertebrate Comparative Heart Structure and Double Circulation