Question

part a assessments
complete the following statements:

1. name six cranial bones that are visible on a lateral view of a skull.
2. the ______________ suture joins the frontal bone to the parietal bones.
3. the parietal bones are firmly interlocked along the midline by the ______________ suture.
4. the ______________ suture joins the parietal bones to the occipital bone.
5. the temporal bones are joined to the parietal bones along the ______________ sutures.
6. name the three cranial bones that contain sinuses.
7. name a facial bone that contains a sinus.

part b assessments
match the bones in column a with the features in column b. place the letter of your choice in the space provided. (some answers are used more than once.)
column a
a. ethmoid bone
b. frontal bone
c. occipital bone
d. parietal bone
e. sphenoid bone
f. temporal bone
column b

1. forms sagittal, coronal, squamous, and lambdoid sutures
2. cribriform plate
3. crista galli
4. external acoustic meatus
5. foramen magnum
6. mandibular fossa
7. mastoid process
8. middle nasal concha
9. occipital condyle
10. sella turcica
11. styloid process
12. supraorbital foramen

Explanation:

1. On a lateral view of the skull, the parietal, occipital, temporal, frontal, sphenoid, and zygomatic bones are visible. The nasal bone is not typically visible on a lateral view of the skull.
2. The coronal suture joins the frontal bone to the parietal bones.
3. The parietal bones are firmly interlocked along the mid - line by the sagittal suture.
4. The lambdoid suture joins the parietal bones to the occipital bone.
5. The temporal bones are joined to the parietal bones along the squamous sutures.
6. The frontal, ethmoid, and sphenoid bones contain sinuses.
7. The maxilla is a facial bone that contains a sinus (maxillary sinus).

For the matching part:

• a. Ethmoid bone: 2. Cribriform plate, 3. Crista galli, 8. Middle nasal concha
• b. Frontal bone: 12. Supraorbital foramen
• c. Occipital bone: 5. Foramen magnum, 9. Occipital condyle
• d. Parietal bone: 1. Forms sagittal, coronal, squamous, and lambdoid sutures
• e. Sphenoid bone: 10. Sella turcica
• f. Temporal bone: 4. External acoustic meatus, 6. Mandibular fossa, 7. Mastoid process, 11. Styloid process

Answer:

1. Parietal, Occipital, Temporal, Frontal, Sphenoid, Zygomatic
2. Coronal
3. Sagittal
4. Lambdoid
5. Squamous
6. Frontal, Ethmoid, Sphenoid
7. Maxilla

Matching:
a. 2, 3, 8
b. 12
c. 5, 9
d. 1
e. 10
f. 4, 6, 7, 11