PDF chapter test TRY NOW
Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction – upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.

1. Muscular floor of chest cavity -
2. Tiny pores on the surface of leaf -
Answer variants:
Spiracles
Ribs
Nostrils
Trachea
Lungs
Stomata
Yeast
Diaphragm
Ant
