Bee hummingbird, zunzuncito or Helena hummingbird (Mellisuga helenae) is a species of hummingbird which is the world's smallest bird and the smallest known dinosaur. It is native to Cuba.
It’s called cytoplasm I think that’s it
Answer: they absorb photons from sunlight.
Explanation:
the tiny blood vessels surrounding the alveoli are called capillaries.
the capillaries have thin walls and are connected to the larger blood vessels ( veins) and they bring oxygen to the heart threw oxygenated blood.
