What are bones made mostly of?

• Protein and calcium phosphate

• Collagen and calcium phosphate

• Protein and phosphorus

• Collagen and phosphorus

What is the outer surface of each bone called?

• Periosteum

• Compact bone

• Cancellous bone

• Endosteum

Which layer of bone tissue is full of holes and looks like a sponge?

• Compact bone

• Periosteum

• Cancellous bone

• Endosteum

What is the substance called that fills the open spaces in cancellous bone?

• Red bone marrow

• Yellow bone marrow

• Hematopoietic stem cells

• Adipocytes

What is the function of red bone marrow?

• Making new blood cells

• Storing fat

• Developing into different cell types

• Repairing and healing cartilage

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What is the hollow area at the center of long bones called?

• Periosteum

• Compact bone

• Cancellous bone

• Medullary cavity

What is the purpose of yellow bone marrow?

• Making new blood cells

• Storing fat

• Developing into different cell types

• Repairing and healing cartilage

What is the thin sheet of material that lines the inner surfaces of bones called?

• Periosteum

• Compact bone

• Endosteum

• Cancellous bone

What do osteoblasts do?

• Break apart and recycle old bone tissue

• Make new bone

• Talk to other bone cells

• Cover the bone surface

What type of cells break apart and recycle old bone tissue?

• Osteoprogenitor cells

• Osteoblasts

• Osteocytes

• Osteoclasts