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Components of Skull
Cranial Bones
Facial Bones
Fibrous Joints
Facial Muscles
Cranial Bones
Enclose and protect brain
8 bones
Frontal
Parietal (2)
Temporal (2)
Occipital
Sphenoid
Ethmoid
Frontal Bone
Protects frontal lobe
Forehead
Parietal Bones
Protects parietal lobes
walls of skull
Temporal Bones
protects temporal lobe
temples
Occipital Bone
Protects occipital lobe and brainstem
lower, under skull
Sphenoid Bone
Protects brain and Pituitary gland
Cranial process, bat-shaped
Ethmoid Bone
Protects frontal lobe and nasal cavity
Irregular shape
Facial Bones
Form the face
14 bones
Nasal (2)
Maxillae (2)
Zygomatic (2)
Mandible
Lacrimal (2)
Palatine (2)
Inferior Nasal Conchae (2)
Vomer
Nasal Bones
Protects nasal cavity
bridge of nose
Maxillae Bones
Protects eyes, oral cavity
keystone bone of face
Zygomatic Bones
Protects eyes
Cheek bones
Mandible bone
Protects teeth, gums
Lower jaw
Lacrimal Bones
Protects lacrimal apparatus in eye
Palatine Bones
Breathe while chewing
Roof of mouth
Inferior Nasal Conchae Bones
Filters air for lungs
Vomer
Part of Nasal Septum
Plow shaped
Synarthrosis
no movement, fibrous tissue
Sutures
Immovable joints between cranial bones
Coronal Suture
Coronal/Frontal plane
Front of skull
Lambdoid Suture
Posterior (back) skull
Squamous Suture
Squamous portion of temporal bone
Side of skull
Sagittal Suture
Sagittal plane (vertical halves)
Top skull
Gomphosis
Immovable
Collagen Fibers
Fontanels
Sutures not yet formed
Softer fibers
Temporomandibular Joint (TMJ)
Diarthrodial (free moving)
Facial Muscles
Move face
Epicranius Muscle
Raises eyebrows, wrinkles forehead
Forehead
Zygomaticus Major Muscle
Raises lateral corners of mouth (smile)
Cheeks
Orbicularis Oculi Muscle
Closes eyelids
Eyes
Orbicularis Oris Muscle
Close mouth, pucker lips
Mouth
Mentalis Muscle
Pout
Chin
Buccinator Muscle
Blowing
Cheek
Platysma Muscle
Tense neck
Neck
Masseter Muscle
Chewing
Zygomatic Arch → Mandible