Grade 11 Biology
Curated by: Khan Academy India - English (3 videos)
What makes a bird a bird? In this video, we explore the defining features of Aves—from feathers and beaks to pneumatic bones and specialized lungs. Learn how their body structure supports flight, movement, and survival in various environments. We’ll also examine their reproductive traits, warm-blooded nature, and explore examples of birds with unique adaptations. It’s a closer look at a group that’s as fascinating on land as it is in the sky! 00:00 - Introduction 00:39 - Evidence of evolution 01:21 - Characteristic features - Flight and feathers 01:32 - Flightless bird 01:43 - Beak 02:05 - Hind limbs 02:40 - Preening 03:16 - Hollow bones 04:20 - Respiration with air sacs 06:37 - Mechanism of breathing 08:19 - Heart 09:45 - Digestive system 11:54 - Reproduction Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Vandhana Ashok