So that the bird is not too heavy to fly and to aid in the intake of oxygen as the bird breaths in flight.
they have hollow bones because they need to be light
they have hollow bones because they need to be light
Bones are light because they are hollow in the middle.
Birds bones are hollow. That is why they can fly, because they are so light because of their hollow bones. x)
Wings and Hollow Bones
They are hollow and light.
Birds have hollow bones to help them fly. Solid bones would add to much weight and make it impossible to fly.
bird bones are hollow. that is why they are light
all birds are light because they have hollow bones
Bird bones are light because they are hollow.
They have hollow bones.
Birds have hollow bones to help them fly. Solid bones would add to much weight and make it impossible to fly. They have crisscross structures to add support inside the bones.