Home › UP Board Class 10 › biology › c10respiration › Per NCERT, in human RESPIRATORY system, what TIN…
Per NCERT, in human RESPIRATORY system, what TINY balloon-like structures in the lungs provide the gas-exchange surface?
AAlveoli (singular: alveolus) — with extensive blood-vessel network
BTrachea
CBronchi
DCilia
Answer & Solution
Correct answer: A. Alveoli (singular: alveolus) — with extensive blood-vessel network
Per NCERT §5.3, alveoli are the gas-exchange surfaces (~80 m² total surface area). Bronchi/trachea are passages; cilia clear debris.
Related questions
Per NCERT, why is the rate of BREATHING in aquatic organisms FASTER than in terrestrial anPer NCERT, how do FISH obtain oxygen for respiration — in their aquatic environment?Per NCERT, in humans how is CO₂ mostly transported in blood?Per NCERT, what RESPIRATORY PIGMENT in human blood carries oxygen from the lungs to tissuePer NCERT, what is the energy released when the TERMINAL PHOSPHATE bond in ATP is broken uPer NCERT, what is ATP — and what is its role in cells?Per NCERT, why do MUSCLE CRAMPS occur during sudden vigorous activity?Per NCERT, what does ANAEROBIC respiration in YEAST produce from pyruvate?