Tobi says: Bird's bones are hollow to help them fly,obviously to reduce weight when they fly. Human bones, on the other hand, are not hollow. We need strong bones to do the things we do, eg: walking, skipping, jumping etc...
A bird's bones are virtually hollow so that they are light weight so the birds can fly. Other animals, including humans, have more marrow in our bones and they are very heavy compared to bird bones.
They are partially hollow, to make less weight for them.
Birds bones are hollow so they are more lightweight, and make for better flying. Human bones do not need to fly so we have solid bones.
Animals like insects, have exoskeletons-basically they have no bones, and only have tough,protective, often shell like skin. Animals like cats, dogs, horses, giraffes and and birds are all endoskeletons- they have bones, and those bones are internal (on the inside of the skin).
The relationship between a humans pregnancy length and average life span is not so different than other mammals. It appears to be closely related to size.
Because people kept finding their fossilized bones as well as complete animals frozen in the permafrost of Siberia. There aren't any of those animals living now so they must be extinct.
animals that have scales are snakes, crocodile's, and fish not only those animals but other species to like dinosaurs which are extinct .
A bird has to have feathers, hollow bones, and be warm-blooded. So if a bird has those characteristics it is a bird.Lay eggs and birds are Vertebrates.
In one sense, since humans are animals, your brain does not differ from the brina of an animal. human brains, and those of the other great apes, do differ from those of other animals in size relative to body size. In addition, human brains have structured that some other animals, reptiles, for example, lack.
In one sense, since humans are animals, your brain does not differ from the brina of an animal. human brains, and those of the other great apes, do differ from those of other animals in size relative to body size. In addition, human brains have structured that some other animals, reptiles, for example, lack.
Human bones are thicker and denser; bird bones are thinner, hollow and mean less weight on the bird.
It depends on the animal. There are thousands of different animals and thousands of different species of those animals.
A baby has over 300 bones to begin with, and by adulthood, those bones form with other bones and cartilages, resulting in about 206 bones in his/her body.
The hand is part of the human body that has 27 bones. Out of the 27 bones eight of those bones are in the wrist.
Animals like insects, have exoskeletons-basically they have no bones, and only have tough,protective, often shell like skin. Animals like cats, dogs, horses, giraffes and and birds are all endoskeletons- they have bones, and those bones are internal (on the inside of the skin).
In one sense, since humans are animals, your brain does not differ from the brina of an animal. human brains, and those of the other great apes, do differ from those of other animals in size relative to body size. In addition, human brains have structured that some other animals, reptiles, for example, lack.
Have different animals have babies then let those babies have babies with different animals.
Bones can decay like any other organic material. Sometimes, however, bones can be preserved in rock - those are called fossils.
All mammals have hair and mammary glands. Nearly all give live birth where most other animals lay eggs. Mammals also have a distinctive skeletal system that is different from those of other animals.Mammals are warm blooded air-breathing vertebrate animals that are categorized by their hair, three middle ear bones and the mother nursing their young ones with milk.
If you're asking about the joinings of the different bones, those would be "sutures".