As per your syllabus, oxygen-rich blood from the lungs enters which chamber of the heart FIRST?
AAorta directly
BRight atrium
CLeft atrium
DRight ventricle
Answer & Solution
Correct answer: C. Left atrium
As per your syllabus, oxygenated blood from lungs
→ left atrium → left ventricle → body via aorta.
Keep practising Lifelines of National Economy
Browse all Lifelines of National Economy questions for CBSE Class 10, or explore more Biology topics.