pt. 3 “Anatomy and Physiology: Bone Cells, Joints, and Skull Structures

Osteocyte

Star shaped and is the most common cell found in the mature bone. It maintains bone tissue and can live up to 25 years. It's located in the compact bone, and contained in the bone matrix inside, lacunae which interconnects through canaliculi.

Lacunae

Between the rings of matrix, the bone cells (osteocytes) are located in spaces called

Calcium

Bone serves as storage of calcium.

Osteoclasts

They are large, multinucleate cells responsible for the breakdown and reabsorption of bone tissue, to obtain calcium and phosphorus ions.

Fasciae

They attach, separate, protect and stabilize muscles, and most of the organs.

ECM

They contain mainly collagen and elastic fibers, secreted by the chondroblasts and some fibroblasts (also found in the perichondrium).

Hyaline

The main component of the extracellular matrix is collagen (type 2).

Fibrous Joint

Joints that lack a joint cavity (or articular space).

Symphyses

Joints that allow little movement and are connected through fibrous cartilage.

Articular Disc (Menisci)

Fibrous cartilages found between the articular surfaces, biconcave, that divide the articular capsule in 2 compartments.

Menisci

Incomplete disks of fibrous cartilage, crescent-shaped, found only in the femorotibial joint.

Body and Ramus

Identify the two parts of mandible.

Sphenoid complex

Constitutes the base of the neurocranium and it's where the optic canal is formed.

Malar

Zygomaticus bone is also known as _____ bone.