What adaptations helps a bird obtain oxygen?

Birds possess several adaptations to efficiently obtain oxygen, including a unique respiratory system featuring air sacs that allow for a continuous flow of air through their lungs, ensuring a constant supply of oxygen. Their lungs are highly vascularized, facilitating efficient gas exchange. Additionally, birds have a higher concentration of hemoglobin in their blood, which enhances their ability to transport oxygen. The structure of their beaks and efficient flight muscles also contribute to their overall respiratory efficiency during high-energy activities.