A&P 1 Chapter 6 Problem Set

What is found lining the marrow cavity of a long bone?

Endosteum

What is the difference between the epiphysial plate and the epiphyseal line?

The epiphyseal plate is a plate of hyaline cartilage where growth and ossification is happening, while the epiphyseal line is the ossified line visible AFTER growth has happened

What is true between osteoblasts and osteoclasts?

They are types of cells found in bone connective tissue

What cells are responsible for early stages of endochondral ossification?

Chondrocytes

What is the name of the layers of bone matrix in an osteon?

Lamellae

What are the small channels that radiate through the matrix of the bone?

Canaliculi

What is the function of caniculi?

Allow osteocytes to communicate with each other

What does the term osteoid refer to?

The organic parts of the matrix of compact bones

What is the largest mass of the bone due to?

Hydroxyapatite

What tissue is the forerunner of long bones in the embryo?

Hyaline cartilage

List items that might be found in the central canal of an osteon

Arteries, veins, capillaries

What is spongy bone made of?

Trabeculae with gaps in between them

What are sacrificial bonds?

Weak links in the collagen that wraps around the lamella in an osteon

Why are sacrificial bonds important?

They break when subjected to stress or force, saving the bone from absorbing this force and possibly fracturing

What provides a bones resistance to twisting pressure?

Collagen fibers between the lamellae of osteons