SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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hollow bones and specialized beaks
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dry, scaly skin
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milk glands
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moist skin
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Detailed explanation-1: -Flightless birds do have hollow bones. Ostriches and emus have hollow femurs. It’s thought that the air sac system that extends into their upper legs is used to reduce their body heat by panting. This bone specialization isn’t found only in birds.
Detailed explanation-2: -They are called pneumatic bones (pro-nounced New-Matic) and include the skull, humerus, clavicle, keel (sternum), pelvic girdle, and the lumbar and sacral vertebrate. Another important type of bone in the avian skeleton is medullary bones. These include the tibia, femur, pubic bone, ribs, ulna, toes and scapula.
Detailed explanation-3: -Skeleton. Birds have a lightweight skeleton made of mostly thin and hollow bones. The keel-shaped sternum (breastbone) is where the powerful flight muscles attach to the body. Birds have a smaller total number of bones than mammals or reptiles.
Detailed explanation-4: -Birds have hollow bones, which keep their body light for flight. Q. Wings of birds are made of feathers and hollow bones.