Zool 3214 1st Edition Lecture 7 Current Lecture1. General Features- Flat bones of Skull: Compact Bone & Spongy Bone (Diploe)A. Assembly- Sutures: fibrous joints of the CT- Fetus: can see fontanels (soft spots) ex. Anterior Fontanel1. Coronal Suture2. Sagittal Suture3. Lambdoid Suture4. Squamous Suture (on the side of skull)B. Regions of the Skull1. Cranium (Brain Case)- Calvaria “Skull Cap”- Base & Floor2. Facial Bones: have no direct contact w/meninges and anterior to craniumC. Cavities- Orbits (eyes)- Nasal- Oral- Cranial - Middle & Inner Ear Cavities- Sinuses: spaces within layers of compact bone2.Cranial BonesA. Frontal Bone (1): Forehead- Ant. & Post. Cranium- Sup orbits- Frontal SinusThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Glabella- Supraorbital Foramen or Notch- Coronal Suture (Feature)- Ant. Cranial fossaB. Parietal Bones (2): Top & Side of Head- Sup. & Lateral walls of cranium- Temporal lines: extend into other bones- Know Sutures**C. Temporal Bones (2)1. Squamous Part*Zygomatic process of temporal bone**Mandibular Fossa ** (TMJ)2. Tympanic Part*External auditory meatus*Styloid process “Dagger Like”3. Mastoid Part*Mastoid Process4. Petrous Part: “Ridge”*Cranial Floor*Long ridge*Carotid Canal*Houses inner/mid ear cavity*Internal auditory meatusD. Occipital Bone (1): Post. & Inf. Cranium- Occipital fossa (post cranial fossa)- Occipital condyles- Large foramen magnum- External occipital per tuberance- Sup. & Inf. Nuchal lines “ridges for muscle attachment”E. Sphenoid (1): Irregular Bone “butterfly”- Forms part of middle cranial fossa- Sella turcica (middle of bone)- Greater & Lesser wings of sphenoid- Medial-inferior orbit- Optic canal- Sphenoid