Question: What did ancient people think caused tooth decay?: Answer: Sumerian clay tablets from 5,000 to 7,000 years ago attribute tooth decay to the work of tiny worms, a belief that persisted in many cultures until modern times.

Question: What is the smallest bone in the human body?: Answer: The stapes is a tiny bone in the middle ear. It is the smallest bone in the human body.

Question: Animals with spines are called:: Answer: A vertebrate is an animal with a backbone. Fishes, amphibians, reptiles, birds, and mammals, including humans, are all vertebrates.

Question: Where on the human body is the mandible located?: Answer: The mandible is the lower jawbone. It is also called the inferior maxillary.

Question: Which of these is not a kind of tooth?: Answer: The patella is the kneecap.

Question: About how many bones do newborn humans have?: Answer: Newborn humans are born with a little more than 300 bones. Some of these fuse together, so that adult humans have 206 bones.

The Skeletal Puzzle

About how many bones do newborn humans have? What is the smallest bone in the human body? From mandibles and teeth to phalanges and spines, test your knowledge of bones in this quiz.

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Encyclop?dia Britannica, Inc.

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