A four-chambered heart with a right systemic arch only is present in?
Correct answer: C. Birds
- A. Amphibians
- B. Reptiles
- C. Birds
- D. Mammals
Explanation
A four-chambered heart with a right systemic arch is present in BirdsBirds have a unique circulatory system in which they possess a four-chambered heart with complete separation of oxygenated (left side) and deoxygenated (right side) blood, but they have a right systemic arch. This adaptation allows them to meet the high oxygen demands of their active lifestyles, such as flying. Mammals (Option D) also have a four-chambered heart, but they typically have a left systemic arch. Amphibians (Option A) and reptiles (Option B) generally have three-chambered hearts with varying degrees of mixing of oxygenated and deoxygenated blood.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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