08-14-2019, 10:58 PM
Watch some videos to understand this chapter in a better manner:
CBSE Class 11 Biology Textbook Chapter 17- BREATHING AND EXCHANGE OF GASES
https://www.youtube.com/watch?v=k8OH3RO2Cl8
https://www.youtube.com/watch?v=ifhC876vct4
https://www.youtube.com/watch?v=gnRdT8eKY84
https://www.youtube.com/watch?v=2IyNuRe9-ss
https://www.youtube.com/watch?v=8VUVBgfNwkQ
CBSE Class 11 Biology Textbook Chapter 17- BREATHING AND EXCHANGE OF GASES
https://www.youtube.com/watch?v=k8OH3RO2Cl8
https://www.youtube.com/watch?v=ifhC876vct4
https://www.youtube.com/watch?v=gnRdT8eKY84
https://www.youtube.com/watch?v=2IyNuRe9-ss
https://www.youtube.com/watch?v=8VUVBgfNwkQ