The term for an internal skeleton.

• exoskeleton

• endoskeleton

• chitin

• shell

A typical adult skeleton contains ______ bones.

• 602

• 275

• 206

• a lot of

TRUE or FALSE: A newborn's skeleton has more bones than an adult.

• True

• False

The dense, hard outer layer of bone tissue.

• compact

• spongy

• periosteum

• marrow

Which answer best describes spongy bone?

• hard and dense

• weak and heavy

• compact and solid

• strong and lightweight

The thin membrane that covers the surface of bones.

• cartilage

• red marrow

• periosteum

• ligament

What substance found in the spaces of spongy bone produces blood cells?

• red marrow

• yellow marrow

• tendons

• calcium

What substance is stored in yellow marrow?

• protein

• carbs

• fat

• nucleic acid

The central part of the skeleton that helps protect internal organs.

• axial skeleton

• appendicular skeleton

• exoskeleton

• cartilage

Which bones make up the appendicular skeleton?

• cranium and ribs

• vertebrae

• sternum and coccyx

• arm and leg bones