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Skeletal System

Ossification – Intramembranous and Endochondral Ossification and Their Functions

The process of bone formation is called ossification (os-i-fi-ka’-shun). It begins during the sixth or seventh week of embryonic development. Bones are formed by the replacement of existing connective tissues with bone. There are two types of bone formation: intramembranous ossification and endochondral ossification. In both types

Cranium – What Bones Form The Cranium?

The cranium is formed of one frontal bone, two parietal bones, one sphenoid, two temporal bones, one occipital bone, and one ethmoid. The frontal bone forms the anterior part of the cranium, including the superior portion of the orbits (eye sockets), the forehead, and the roof of

Articulations – Immovable, Slightly Movable, or Freely Movable Joints

The junction between two bones or between a bone and a tooth forms an articulation, or joint. Joints allow varying degrees of movement and are categorised as immovable, slightly movable, or freely movable. Immovable Joints Bones forming an immovable joint, or synarthrosis (sin-ar-thro’-sis), are tightly joined and

Disorders of The Skeletal System, Bones and Joints

Common disorders of the skeletal system may be categorised as disorders of bones or disorders of joints. Orthopaedics (or-tho-pe-diks) is the branch of medicine that specialises in treating diseases and abnormalities of the skeletal system.   Disorders of Bones Fractures are broken bones. Fractures are the most

Deciduous And Permanent Teeth and Structure of a Tooth

Teeth are important accessory digestive structures that mechanically break food into smaller pieces during mastication (mas-ti-ka’-shun), or chewing. Humans develop two sets of teeth: deciduous and permanent teeth. Enamel: It is the hardest bodily tissue that covers the surface of the dental crown. It is as hard

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