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Axial Skeleton

A&P Chapter 7 Dr.Cutler

QuestionAnswer
How many bones are in the Axial Skeleton? 80 bones
How many bones are in the Appendicular Skeleton? 126 bones
What does the Axial Skeleton contain? Skull bones, auditory ossicles, hyoid bone, ribs, sternum, and bones of the vertebral column
What does the Appendicular Skeleton contain? Upper and Lower limbs and bones forming girdles
What are the 5 types of Bones based on SHAPE? Long, Short, Flat, Irregular, Sesamoid
What are Sutures? Jointed areas where flat bones come together
What are Sutural Bones? Small, extra bone plates located within the sutures of cranial bones
What are the Bone Surface Markings? (2 Major Types) Depressions/openings and processes
What is a Fissure? Narrow Slit between bones
What is a Foramen? Hole for passage of blood vessels, nerves or ligaments
What is a Fossa? Shallow depression
What is a Meatus? Tubelike opening
What is a Sulcus? Furrow on a bone for passage of blood vessel, nerve or tendon
What is a Condyle? Rounded projection with a smooth surface
What is a Facet? Smooth, Flat, slightly concave articular surface
What is a Head? Rounded articular process supported on a neck
What is a Crest? Prominent ridge
What is an Epicondyle? Rough projection on a condyle
What is a Line? Long, narrow ridge or border
What is a Spinous Process? Sharp, slender projection
What is a Tubercle? Variably sized rounded projection
What is a Trochanter? Very large projection ONLY found on the femur
What is a Tuberosity? Variably sized projection with rough, bumpy surface
What is the Mandible? Largest, strongest facial bone, only moveable skull bone
What is the Paranasal Sinuses? Mucous membrane lined cavities in the frontal, maxillary, sphenoid and ethmoid bones
What is the Fontanels? Mesenchyme filled between cranial bones present at birth (cone headed baby)
What does the Hyoid Bone do? Supports the tongue
What does the Intervertebral Discs do? Separate the vertebrae from one another
What is the Cervical Spine? Transverse foramina to protect the vertebral artery
What is the Atlas C1? Nodding, holds head (greek god holding world)
What is the Axis C2? Dens/Odontoid process, shaking head NO
What is the Thoracic Spine? Giraffe Face Shape, supports the ribs
What is the Lumbar Spine? Largest and strongest in the vertebral column, moose head shape, fuse with sacrum
What is the Sacral Spine? Triangular Shaped Sacrum, part of pelvic girdle
What is the Coccyx? Triangular shape, composed of 4 vertebrae
What is the Sacrum? Heart Shaped Bone
What is the Sternum? Breastbone, located in center of chest
What do the Ribs do? Provide support, connects to sternum through cartilage
What ribs are True Ribs? 1-7
What ribs are False Ribs? 8-10
What ribs are Floating Ribs? 11-12
What is a Disc Herniation? Leaking cartilage between bones (Cesar)
What is Scoliosis? Increased Lateral curvature (side)
What is Kyphosis? Increased Thoracic curve-bent forward
What is Lordosis? Increased Lumbar curve-bent backwards (twerking)
What is Spina Bifida? Defect in the vertebral column, laminae doesn't develop normally
What does the vertebral column do? Protects the spinal cord
Created by: delainaxrepola