skeletal system lesson 2

Condyle

Large rounded process

Foramen

Hole and bone for arteries, vein, and nerves

Sinus

Hollow cavity and bone

Suture

Fibrous joint that holds the bones of skull together

Trochanter

A large bump found on the femur bone

Tubercle

Round bump, which serves as a site for muscles and ligament attachments

Tuberosity

Round bump that has more gradual shape

Axial skeleton contains

Skull, spine, ribcage and sacrum

Sutures

Bone held together by joints, immovable and composed of dense fibrous CT

Sagittal suture

Connect parietal bones at top skull

Coronal suture

Connect both parietal to frontal bone

Lambdoid suture

Connects occupital to posterior of parietal

Squamous suture

Connect parietal bone to temporal bone

styloid process

Pointy process

supraorbital margin

Located in the frontal bone, which is a thickened process above the orbits that helps to protect the eye.

suprorbital foramen

is a passageway for blood vessels supplying the frontal sinus, eyebrow, and eyelid.

foramen magnum

On the occipital bone, which is a passageway for the spinal cord.

zygomatic process

forms the posterior portion of the zygomatic arch. It articulates with the temporal process of the zygomatic bone.

mastoid process

site of muscle attachments for some of the neck muscles. It also contains small air cavities called air cells that connect with the middle ear.

styloid process 

pointed process that attaches to ligaments that support the hyoid bone.

external auditory canal 

tubelike structure that houses structures for the external and middle ear.

sella turcica

(Turkish saddle) which is a grove in the central region of the sphenoid. The pituitary gland resides in the sella turcica.

lesser wings 

extend laterally and are anterior to the sella turcica

greater wings

lateral to the sella turcica and form part of the floor of the cranium.

crista galli 

is a ridge of bone that extends superiorly. A portion of the membrane that surrounds the brain called the dura mater attaches to this ridge.

cribriform plate 

perforated section of bone. Fibers from the olfactory nerve pass through these holes on their way to the frontal lobe of the brain.

perpendicular plate

ridge of bone extending inferiorly and forming the superior portion of the nasal septum

maxilla

located and the anterior aspect of the skull. It is superior to the mandible and inferior to the frontal bone. It forms the upper jaw.

mandible

forms the lower jaw.

condyles

form the lateral part of the temporomandibular joint (TMJ). They articulate with the temporal bone.

zygomatic bones

located in the anterior portion of the skull. They connect with the maxilla, frontal and temporal bones and form the cheeks.

temporal process

extension of bone that connects with the zygomatic process of the temporal bone to form the zygomatic arch.

palatine bone

one of the bones that forms the hard palate. It connects with the palatine process of the maxilla to form the posterior portion of the hard palate. It is located between the maxilla and sphenoid bones.

vomer bone

forms the inferior aspect of the nasal septum. It articulates with the ethmoid, sphenoid, palatines and maxillary bones.