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Diaphragm increases volume of thoracic cavity in _________

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in Biology – Class 11 by (272k points)
Diaphragm increases volume of thoracic cavity in _________

(a) dorsal-ventral axis

(b) anterior posterior axis

(c) lateral regions

(d) side ways

This question was addressed to me in quiz.

Question is from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11

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Right option is (b) anterior posterior axis

For explanation I would say: Radial muscles are present in diaphgram. By the contraction in these muscles, diaphragm becomes flattened in shape, so, volume of thoracic cavity increases in anterior posterior axis.

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