Skull Anatomy Labeling

1. Review a textbook section on the skull.

2. As a review activity, label figures 13.1, 13.2, 13 3, 13.4, and 13.5.

3. Examine the cranial bones of the articulated human skull and the sectioned skull. Also observe the corresponding disarticulated bones. Locate the following bones and features in the laboratory specimens and, at the same time, palpate as many of these bones and features in your own skull as possible.

frontal bone supraorbital foramen frontal sinuses parietal bones sagittal suture coronal suture occipital bone lambdoidal suture foramen magnum occipital condyles temporal bones squamosal suture external auditory meatus mandibular fossae mastoid process styloid process carotid canal jugular foramen internal acoustic meatus zygomatic process sphenoid bone sella turcica greater and lesser wings sphenoidal sinuses ethmoid bone cribriform plates perpendicular plate superior nasal concha

Figure 13-1 Label the anterior bones and features of the skull. (If the line lacks the word bone, label the particular feature of that bone.)

Lacrimal bone Ethmoid bone

Sphenoid bone

Figure 13-1 Label the anterior bones and features of the skull. (If the line lacks the word bone, label the particular feature of that bone.)

Lacrimal bone Ethmoid bone

Sphenoid bone

Bones The Skull

middle nasal concha ethmoidal sinuses crista galli

4. Complete Parts A and B of Laboratory Report 13.

5. Examine the facial bones of the articulated and sectioned skulls and the corresponding disarticulated bones. Locate the following:

maxillary bones maxillary sinuses palatine processes alveolar processes alveolar arch palatine bones zygomatic bones temporal process zygomatic arch lacrimal bones nasal bones vomer bone inferior nasal conchae mandible ramus mandibular condyle coronoid process alveolar border mandibular foramen mental foramen

6. Complete Part C of the laboratory report.

OPTIONAL ACTIVITY

U se colored pencils to differentiate the bones illustrated in figures 13.1-13.5. Select a different color for each individual bone in the series. This activity should help you locate various bones that are shown in different views in the figures. You can check your work by referring to the corresponding figures in a textbook, which are presented in full color.

7. Locate the following features of the human skull: carotid canal foramen lacerum

Figure 13.2 Label the lateral bones and features of the skull.

Figure 13.2 Label the lateral bones and features of the skull.

Label The Lateral Features The Skull
Figure 13.3 Label the inferior bones and features of the skull.
Skull Anatomy Labeling

Figure 13-4 Label the bones and features of the floor of the cranial cavity.

Anterior

Figure 13-4 Label the bones and features of the floor of the cranial cavity.

Anterior

Figure With Orbital Fissures

superior orbital fissure supraorbital foramen 8. Complete Parts D and E of the laboratory report.

DEMONSTRATION

E xamine the fetal skull (fig. 13.6). Note that the skull is incompletely developed and that the cranial bones are separated by fibrous membranes. These membranous areas are called fontanels, or "soft spots." The fontanels close as the cranial bones grow together. The posterior fontanel usually closes within a few months after birth, whereas the anterior fontanel may not close until the middle or end of the second year. What other features characterize the fetal skull? _

foramen magnum foramen ovale foramen rotundum foramen spinosum greater palatine foramen hypoglossal canal incisive foramen inferior orbital fissure infraorbital foramen internal acoustic meatus jugular foramen mandibular foramen mental foramen optic canal stylomastoid foramen

Figure 13-5 Label the bones and features of the sagittal section of the skull.

Inferior nasal concha

Figure 13-5 Label the bones and features of the sagittal section of the skull.

Inferior nasal concha

Bones And Features Sagittal Sections

Internal acoustic meatus

Jugular foramen

- Alveolar arch

Internal acoustic meatus

Jugular foramen

- Alveolar arch

Critical Thinking Application

Explain how a severe blow under the nose could result in brain damage or death.

Critical Thinking Application

Explain how a severe blow under the nose could result in brain damage or death.

Web Quest

What are the functions of individual bones and features? Search these and review the anatomy of the skeleton at http:// www.mhhe.com/biosci/abio/martinlmwq.mhtml

Figure 13.6 Human fetal skeleton.

Fetal Skull Fontanelle
Fontanel (anterior)

Laboratory Report

Name_

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Responses

  • kirstie
    What other features characterize the fetal skull?
    2 years ago
  • annabelle
    What part of the skull are the superior nasal concha?
    1 year ago
  • Tiziana
    What features are inferior to the cranium and superior to the manibular?
    1 year ago
  • mariam
    How are the frntanels and the foramen the same?
    1 year ago
  • kifle
    What skull bone lacks a foramen?
    9 months ago
  • lemlem
    Where is the foramen magnun in the human skull with label?
    9 months ago
  • Primula
    How to learn to lable the head bones?
    7 months ago
  • stig
    What other features charaterized the fetal skull?
    2 months ago
  • Gruffo
    What features charaxterize a fetal skull?
    10 days ago

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