Chapter 7 Lecture Study Guide - Axial Skeleton

Chapter 7Lecture study guide Axial Skeleton

Zygomatic Arch

Formed by the zygomatic process of the temporal bone and the temporal process of the zygomatic bone. (Cheek bones)

Petrous portion

Wedge shaped mass of bone located between sphenoid and occipital bones within cranial cavity

Sphenoid bone

Greater wing

Lesser wing

Pterygold process

Optic canal

Sella turcica

Foramen lacerum

Foramen rotundum

Axial vs Appendicular

Your axial skeleton is made up of the bones in your head, neck, back and chest.

Your appendicular skeleton is made up of everything else — the bones that attach (append) to your axial skeleton. Your appendicular skeleton includes the bones in your shoulders, pelvis and limbs, including your arms, hands, legs and feet.

Your axial skeleton is made up of the bones in your head, neck, back and chest. Your appendicular skeleton is made up of everything else — the bones that attach (append) to your axial skeleton. Your appendicular skeleton includes the bones in your shoulders, pelvis and limbs, including your arms, hands, legs and feet.

Ethmoid bone

Crista galli

Perpindicular plate

Cribiform foramina.

Middle nasal concha

Your axial skeleton is made up of the bones in your head, neck, back and chest. Your appendicular skeleton is made up of everything else — the bones that attach (append) to your axial skeleton. Your appendicular skeleton includes the bones in your shoulders, pelvis and limbs, including your arms, hands, legs and feet.

Facial Complex

Zygomatic bone

Mandible bone

Lacrimal bones

Nasal bones

Palatine bones

Vomer bone

Inferior nasal concha

Hyoid bone

Thoracic cage

The thoracic cage is formed by the (a) sternum and (b) 12 pairs of ribs with their costal cartilages. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process. The ribs are classified as true ribs (1–7) and false ribs (8–12). The last two pairs of false ribs are also known as floating ribs (11–12).

Atlas, Axis & Hyoid bone

Atlas (c1) - Lacks a body and spinous proces. Superior articular facets articulate with the occipital condyles of the occipital bone of the skull, allowing us to nod our heads “yes”. Rests on the Axis

Axis (c2) - 2 )• Dens (Odontoid process)• The Dens acts as a pivot point, allowing lateral rotation of the atlas, therebyallowing us to shake our heads “no”

Hyoid bone - horseshoe shaped solitary bone. Situated midline of neck. Vital for speech and swollowing.

Female and Male Skulls

Vertebral Column

Atlas and Axis

Atlas articlulates with

Lumbar Vertebrae

Atlas articlulates with

Cervical Vertebrae

Atlas articlulates with

Thoracic Vertebrae

Atlas articlulates with

Hyoid Bone

Atlas articlulates with

Skull Sutures

Atlas articlulates with

Coronal

Saggital

Lamboidal

Squamosal