What bone contains greater and lesser wings?

What bone contains greater and lesser wings?

sphenoid bone
a median portion, known as the body of sphenoid bone, containing the sella turcica, which houses the pituitary gland as well as the paired paranasal sinuses, the sphenoidal sinuses. two greater wings on the lateral side of the body and two lesser wings from the anterior side.

What bone contains the greater wing?

The greater wing or ali-sphenoid of the sphenoid bone is a process which projects from either side of the lower part of the sphenoid body, at a common junction with the pterygoid process 1.

Where is the lesser wings in the skull?

The lesser wing of the sphenoid bone, or orbito-sphenoid, is a sharp, pointed triangular plate arising laterally from the upper anterior portion of the sphenoid body.

Which of the following cranial bones is described as having a lesser wing and greater wing?

Sphenoid bone primarily consists of a centrally positioned body, which surrounds and protects the pituitary gland, and two sets of lateral, wing-like extensions called the greater and lesser wings.

What is ethmoid bone?

The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.

Is the ethmoid bone a flat bone?

The bones that form the top and sides of the brain case are usually referred to as the “flat” bones of the skull. The brain case consists of eight bones. These include the paired parietal and temporal bones, plus the unpaired frontal, occipital, sphenoid, and ethmoid bones.

What is the greater wing?

Medical Definition of greater wing : a broad curved winglike expanse on each side of the sphenoid bone. — called also alisphenoid. — compare lesser wing.

What is the greater wing of sphenoid bone?

alisphenoid
The greater wing of the sphenoid bone, or alisphenoid, is a bony process of the sphenoid bone; there is one on each side, extending from the side of the body of the sphenoid and curving upward, laterally, and backward.

What is the lesser wing of the sphenoid bone?

Anatomical terms of bone The lesser wings of the sphenoid or orbito-sphenoids are two thin triangular plates, which arise from the upper and anterior parts of the body, and, projecting lateralward, end in sharp points [Fig. 1]. In some animals they remain as separate bones called orbitosphenoids.

What is the lacrimal bone?

Fragile Facial Bones Supporting the Eye and Tear System The lacrimal bones are small, flat craniofacial bones located in the eye socket. These rectangular bones consist of two surfaces, one facing the nose, the other facing the eye. Facial fractures can involve the lacrimal bone.

Where are the greater wings of the sphenoid bone located?

Structure. The greater wings of the sphenoid are two strong processes of bone, which arise from the sides of the body, and are curved upward, laterally, and backward; the posterior part of each projects as a triangular process that fits into the angle between the squamous and the petrous part of the temporal bone and presents at its apex…

How is the lesser wing connected to the body?

Borders. The lesser wing is connected to the body by two roots, the upper thin and flat, the lower thick and triangular; between the two roots is the optic foramen, for the transmission of the optic nerve and ophthalmic artery .

Which is part of the skull has two sets of wings?

A central bone within the skull, it has a very complex shape, with a body and two sets of wings—the lesser and greater wings—as well as two pterygoid processes (protrusions that descend from where the wings meet the body).

Is the tip of the great wing called the pterion?

At the tip of the great wing is a triangular portion, bevelled at the expense of the internal surface, for articulation with the sphenoidal angle of the parietal bone; this region is named the pterion .