Histology of Bone Tissue (Haversian system)

Question 1

Matrix of compact bone

Answer 1

Is made of concentric layers of bone tissue

Question 2

Lamellae

Answer 2

Circular plates of bone tissue, having an apparearance of laminated wood or in rings in a tree

Question 3

Haversian Canals

Answer 3

Contain, VAN and lymphatic vessels

Lamellae layers surround the canals

Question 4

Osteocytes

Answer 4

Bone cells

Question 5

Lacunae (nests)

Answer 5

Where osteocytes are housed in small cavities

Question 6

Canaliculi (Little canals)

Answer 6

Small cavities in the bone matrix in which osteocytes are connected with other osteocytes
Contain cytoplasmic cell processes of the osteocytes
Allow for metabolites to difuse btwn the bloood vessels and bone tissue

Question 7

Embryological Bone

Answer 7

Composed of hyalin cartilage -> immature bone tissue -> mature bone tissue

Question 8

Bone tissue repair

Answer 8

When a fracture occurs, the progression of tissue repair reflects the devo previously seen in the embryo, cartilage is formed first, to be replaced by immature, disorganized bone, then organized mature bone

Question 9

Lymphatic vessels in bone

Answer 9

Two functions
Excess tissue fliud is removed.
Abnormal growth occurs in cells or marrow, may spread to other segments via the veins of lymphatic vessels
Or may be brought to bones by cancers in other areas.