Fibrous Joints

1.

Sutures
(plural, the singular is suture)

A suture is an immovable joint (synarthrosis) consisting of a thin layer of dense fibrous connective tissue (definition of a fibrous joint) attaching certain bones of the skull.
The irregular (roughly wave-shaped) interlocking edges of the cranial bones that are attached together by suture joints contribute to the strength of the joint

Sutures between the skull bones

There are many sutures in the skull, prominent examples incl.

• the coronal suture
• the sagittal suture
• the lambdoid suture
• the squamous suture

2.

Syndesmoses
(plural, the singular is syndesmosis)

A syndesmosis is an immovable joint (synarthrosis) at which the bones are attached by fibrous connective tissue (definition of a fibrous joint) which is neither a suture nor a gomphosis.

Distal articulation of tibia and fibula

The articulation between the bases (i.e. the "distal articulation", at he ankle-end) of the tibia and fibula bones.

3.

Gomphoses
(plural, the singular is gomphosis)

A gomphosis is an immovable joint (synarthrosis) in the shape of a socket at which one solid structure in an animal's body is firmly attached to another.

Articulations of teeth in jaw bones

The only gomphoses in the human body are the attachment of the roots of the teeth within the sockets of the alveolar processes of the lower-jaw (mandible) and upper-jaw (maxillae).