invertibrates
Nonexistent.
Chondrichthyes are fish that have bones made of cartridge rather than bones. They also have multichambered hearts, fins in pairs and jaws. Sharks of different kinds fall into this category.
Animals with a skeleton of bone are called vertebrates. This category includes fish, amphibians, reptiles, birds, mammals, primates, rodents and marsupials
flat bones
Coral, jellyfish, and aneomes are hollow bodied animals
Invertebrate animals are animals that have NO bones, such as crabs. Vertebrate animals are animals that HAVE bones, such as dogs.
The coccyx forms a really short tail in humans. It is related to a regular tail in other animals that have them.
All animals have bones.
It depends on which animal you are talking about. Some animals without bones are larger than animals with bones. Compare the Giant Pacific Octopus with a mouse.
Long bones.
There is no official world record for the most broken bones as this is not a category recognized by any governing body. Additionally, having multiple broken bones can vary in severity and complexity, making it difficult to quantify a specific number as a record.
Birds are having hollowbones to enhance their flight, but as in other animals the blood cells are formed in the bones, i doubt where the blood cells are formed in birds
Animals with back bones are known as vertebrates