Bone histology: Spongy and Compact Bone

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Ossification can occur during ______.

C. lifetime
Matured bone is called the _____.

lamellar bone
Where can you find the osteocyte in the bone?

The osteocyte is sandwiched between the lamellae layers.

*Situated at the inner part of the bone.*
________ (a type of bone) appears porous, and has less bone matrix and more space.

Spongy bone
________ (a type of bone) has less space and more matrix. A solid outer layer surrounding each bone.

Compact bone
The interconnecting rods and plates of spongy bones are called the _______.

D. trabeculae

Between the trabeculae are spaces which in life are filled with bone marrow and blood vessels.
Usually blood vessels ____ penetrate the trabeculae.

A. cannot

The trabeculae consist mostly of matrix, so osteocytes must obtain nutrients through their canaliculi.

*Review: Canaliculi are the narrow spaces of the lacunae where nutrients and gases can pass through.*
The surface of the trabeculae are covered with a single layer of (types of bone cells)

(1.) ______ and a few (2)_____.
- (1) osteoblast
- (2) osteoclast
Compact bone is also known as the _____

cortical bone
The functional unit of compact bone is the ______

A. osteon

also known as the haversian system

*In cross section the osteon resembles a circular target: the bull's eye of the target is called the central canal.*
In the central canals of the osteon you can find the following:

A. blood vessels, endosteum, nerves, loose connective tissue
Why is it that among all the bone cells only the osteocyte can maintain the condition of the matrix?

Among all the bone cells only the osteocytes accept and pass on nutrients.

They link to each other through their lacunae and canaliculi to pass on nutrients from one osteocyte to another within each osteon.

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Bone histology: Spongy and Compact Bone

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2023-08-13T07:09:55Z

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