Chapter 7, Axial Skeleton Flashcards
How many adult human bones are in your body
206 bones
The skeletal system is divided into two parts
Axial and appendicular
Axial skeleton
Skull, vertebral column, and thoracic cage
Appendicular skeleton
Shoulder, hip, and lower and upper limbs
Skull
Made of cranial and facial bones
Cranial bones
8 bones form the cranium, has direct contact with the brain
Facial bones
14 bones forming the face, has no brain contact
Bones have what that serve as passageways for blood vessels and nerves?
Markings
Sutures
Immovable joints that are between skull bones
What are the four major sutures?
Coronal, Lambdoid, Sagittal, Squamous
Passageways
Foramen, foramina, and fissures
Foramens/foramina
Opening or hole for vessels and nerves
Fissure
Resembles a cleft( almost like a hole or indent)
Fossa
A depression in the bone
What are the three cranial fossae
Anterior cranial fossa, Middle cranial fossa, Posterior cranial fossa
Do Parietal Skull bone diagram
Look one up
Bones of the face
gives shape to face, form orbital and nasal cavities, supports the teeth, serves as muscle attachment sites
How many paired and unpaired facial bones are there in the 14 facial bones
12 paired, 2 unpaired
12 paired facial bones
Maxillae, Nasal, Lacrimal, zygomatic, and palatine bones, inferior nasal conche
2 unpaired facial bones
vomer and mandible
Paranasal sinuses
Air that fills the spaces in the skull bones and nasal cavities
What does mucous lining do?
humidifies and warms the inhaled air
Orbital complex
The area that holds and protects the eyes, (also contains muscles that help move the eyes)
Auditory ossicles
Three tiny bones in the temporal used for hearing
