MCB 244 chapter 7
true ribs
(1-7) connected to sternum by costal cartilages
False ribs
(8-10) don't attach directly to sternum. Costal cartilages of ribs 8-10 fuse together and merge with the cartilages of rib pair 7 before they reach the sternum
Lumbar Vertebrae
(L1-L5) Support weight of head, neck, upper limbs, and trunk. Small vertebral foramen
Thoracic Vertebrae
(T1-T12) Support weight of head, neck, upper limbs, and chest; articulate w/ ribs to allow changes in volume of thoracic cage All but two (T11, T12) have facets for rib articulations
Sphenoidal fontanelles
@ junctions between the squamous sutures and the coronal suture
What is the name of the second cervical vertebra?
Axis
Identify the articulation site that allows us to nod our head "yes"
Occipital bone-atlas
Which two bones contribute to the zygomatic arch?
Temporal and zygomatic
Among all the cranial bones, which kind of bone do you think is most likely damaged if the person is suffering from hearing loss?
Temporal bones
Which of the following is NOT a paranasal sinus? Frontal sinus b. Sphenoidal sinus Maxillary sinus Zygomatic sinus
Zygomatic sinus
pedicles
form walls of vertebral arch
Cervical Vertebrae
(C1-C7) Support skull (small body), allow controlled head movement, stabilize relative positions of brain and spinal cord (large vertebral foramen and transverse foramina)
mastoid fontanelles
@ junctions between the squamous sutures and the lambdoid sutures.
What is the name of the first cervical vertebra?
Atlas
Thoracic Curve
Primary curve, accommodates the thoracic organs
Lumbar Curve
Secondary Curve, balances the weight of the trunk over the lower limbs. Develops w/ ability to stand
transverse process
Sites of muscle attachment, may articulate with ribs (thoracic vertebrae)
Identify the articulation site that allows us to rotate our heads "no"
Atlas - Axis
Which fontanelle pairs found in the infant skull are located where the labdoid suture would be in adults?
Mastoid and occipital
Identify the region of the skull that articulates with the atlas
Occipital condyles
Spinous process
Where vertebral laminae fuse to complete vertebral arch
superior articular process
articulate with inferioir articular process of superior vertebrae
inferior articular process
articulate with superior articular process of inferior vertebrae
The dens process is found on the
axis
lamina
flat layers that form roof of vertebral arch
Floating ribs (11-12)
have no connection with the sternum. They are attached only to the vertebrae and muscles of the body wall.
occipital fontanelle
junction between lambdoid and sagittal sutures
anterior fontanelle
largest. Lies at the intersection of the frontal, sagittal, and coronal sutures in the anterior portion of the skull "soft spot"
inververtebral foramina
permit passage of nerves running to/from enclosed spinal cord
Sacral Curve
primary curve, accommodates the abdominopelvic organs
Cervical Curve
secondary curve, develops as infant learns to balance weight of head on vertebrae of neck
Vertebral body
transfers weight along axis of vertebral column
