Bone tissue is static.
Bone is made of the basic tissue known as ❌ tissue. There are two extracellular components: ❌. The ❌ component (1/3 of ECM) is mainly ❌ fibres to resist ❌, in a base of proteoglycans which hold water volume. The ❌ component (2/3 of ECM) is what makes bone hard. It contains ❌, which resists ❌.
Which statement about the cellular components of bone is FALSE?
Osteoblasts destroy bone.
Osteoblasts become osteocytes.
Osteoclasts break down the ECM.
Choose the statements about the structure of compact bone which are correct.
The outer layer of compact bone (the periosteum) has holes in it.
It is made up of osteons, which are longitudinal cylinders made of lamellae.
Lamellae are the tubes of ECM, with collagen fibres aligned parallel to direction of growth.
There are no nerves, arteries, or veins in the compact bone.
The osteons maintain the osteocytes by providing them with nutrition.
Choose the statement about osteocytes and compact bone which is CORRECT.
Osteons sit within lacunae.
Central canals bring nutrients to osteocytes.
Canaliculi are smaller than central canals.
The foramen is the opening of the central canal.
Cancellous bone is trabeculous.
The cavities between trabeculae are filled with...
ECM.
Marrow.
Calcium.
Osteons.
Blood cells in the marrow feed osteocytes.
