Cranial, facial bones (1) (2)

Skeleton Anatomy

Major Bones

  • Skull

    • Comprised of various bones including:

      • Facial bones

      • Cranium bones (Cranial vault)

  • Pectoral Girdle

    • Clavicle

    • Scapula

  • Thoracic Cage

    • Ribs

    • Sternum

    • Humerus

  • Vertebral Column

    • Cervical, thoracic, lumbar vertebrae

    • Sacrum

  • Upper Limb

    • Radius, Ulna

    • Carpals, Metacarpals, Phalanges

  • Lower Limb

    • Femur, Tibia, Fibula

    • Tarsals, Metatarsals, Phalanges

Skull Anatomy

  • Cranial Bones

    • Fossae

      • Anterior cranial fossa

      • Middle cranial fossa

      • Posterior cranial fossa

    • Sutures

      • Coronal suture

      • Sagittal suture

      • Lambdoid suture

  • Facial Bones

    • Includes nasal, maxilla, mandible, lacrimal bones, etc.

Bone Details

  • Frontal Bone

    • Forms forehead and orbits

    • Contains frontal sinus

    • Consists of parts:

      • Frontal squama

      • Orbital parts

      • Nasal part (glabella)

  • Parietal Bones

    • Four margins: frontal, sagittal, occipital, squamous

  • Occipital Bone

    • Forms base of the skull

    • Contains:

      • Foramen magnum

      • Occipital condyles

  • Temporal Bones

    • Consists of:

      • Petrous part

      • Temporal squama

Special Features

  • Sinuses

    • Frontal, maxillary, ethmoid, sphenoid sinuses

  • Articulations

    • Mandible forms TMJ with temporal bone.

Additional Structures

  • Maxillae

    • Articulates with all facial bones except mandible

    • Forms part of the orbit and hard palate

  • Mandible

    • The only movable skull bone

    • Contains body, rami, mental foramen, etc.

  • Zygomatic Bones

    • Contributes to facial prominence and orbits

  • Palatine Bones

    • Form posterior hard palate and nasal cavity walls

Nasal Cavity and Associated Structures

  • Nasal Cavity

    • Superior wall: glabella and cribriform plate

    • Contains sinuses and nasal conchae

  • Connections

    • Links to sphenoid and maxillary sinuses, and oral cavity.

Closing Notes

  • Understanding the bone structure and anatomy is crucial for recognizing the overall organization of the skeletal system, which serves both functional and protective purposes.