CHAPTER 7 4 SKELETAL STRUCTURES BY SHAIMA MAGRAD

CHAPTER 7. 4 SKELETAL STRUCTURES BY: SHAIMA MAGRAD MR. SAAABRAS FAVIROTE STUDENT

CONTENT OBJECTIVE: STUDENTS WILL LEARN HOW TO IDENTIFY AND LABEL THE FRONTAL BONE, PARIETAL LOBE, OCCIPTAL LOBE. LANGUAGE OBJECTIVE: STUDENTS WILL PAY ATTENTION WHILE I EXPLAIN THE SECTION.

Crest-Narrow, ridge like projection Epicondyle-Projection situated above a condyle Facet-Small, nearly flat surface Fissure-Cleft or groove Fontanel-Soft spot in the skull where membranes cover the space between bones Foramen-Opening thru a bone that usually serves as a passageway for blood vessels, nerves, or ligaments Fossa-Relatively deep pit or depression Fovea-Tiny pit or depression Head-Enlargement on the end of a bone Linea-Narrow ridge Meatus-Tubelike passageway within a bone Process-Prominent projection on a bone Ramus-Branch or similar extension Sinus-Cavity within a bone Spine-Thornlike projecton Suture-Interlocking line of union between bones Trochanter-Relatively large process Tubercle-Small, knoblike process Tuberosity-Knoblike process usually larger than a tubercle

I. SKULL: A. 22 BONES THAT ARE INTERLOCKED ALONG SUTURES B. -CRANIUM: 1. ENCLOSES AND PROTECTS THE BRAIN 2. THERE'S ATTACHMENTS THAT MUSCLES MAKE CHEWING AND HEAD MOVEMENTS POSSIBLE. 3. THE CRANIAL CONTAIN AIR-FILLED CAVITIES CALLED PARANASAL SINUSES THAT CONNECT NASALS. 4. THE CRANIUM CONSISTS OF 8 BONES

C. EACH CRANIAL BONE PERFORMS A SPECIFIC FUNCTION. 1. LET'S START WITH THE OCCIPITAL BONE. THIS BONE PROTECTS THE BACK OF YOUR BRAIN AND SUPPORTS YOUR HEAD. IT CONTAINS AN OPENING THAT YOUR SPINAL CORD TRAVELS THROUGH. 2. TEMPORAL BONES. THESE TWO BONES PROTECT THE SIDES OF YOUR BRAIN AND SUPPORT YOUR FACE. THE MUSCLES THAT MOVE YOUR JAW RELY ON THESE BONES. 3. ABOVE YOUR TWO TEMPORAL BONES RESIDE THE PARIETAL BONES. THESE BONES FORM THE MAJORITY OF YOUR SKULL. THEIR PRIMARY FUNCTION IS TO PROTECT THE BRAIN 4. FRONTAL BONE. THIS BONE IS LOCATED IN FRONT OF THE PARIETAL BONES AND FORMS THE FOREHEAD. THIS BONE PROVIDES A PROTECTIVE COVERING FOR THE BRAIN (SPECIFICALLY THE FRONTAL LOBES) AS WELL AS SUPPORT FOR YOUR FACE THESE ARE THE SPHENOID BONE AND ETHMOID BONE. THE 5. SPHENOID BONE IS LOCATED BEHIND YOUR EYE SOCKETS AND PROVIDES SUPPORT FOR FACIAL MUSCLES. THE 6. ETHMOID BONE IS LOCATED BETWEEN YOUR EYE SOCKETS AT THE TOP OF YOUR NOSE. IT FORMS THE EYE SOCKET STRUCTURES AND SUPPORTS THE NOSE.

EXIT TICKET /QUIZ WHAT ARE THE 8 CRANIUM BONES?