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Anatomy & Physiology: Axial and Appendicular Skeleton Review

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  • Most superior and most inferior portions of the sternum

    The most superior portion is the manubrium and the most inferior portion is the xiphoid process.
  • Total number of ribs and classification

    There are 12 total ribs. Ribs 1-7 are true ribs (attach directly to sternum), ribs 8-12 are false ribs (indirect or no attachment), and ribs 11-12 are floating ribs (no attachment to sternum).
  • Number of cervical, thoracic, and lumbar vertebrae

    There are 7 cervical, 12 thoracic, and 5 lumbar vertebrae.
  • Unique features of the atlas and axis vertebrae

    The atlas has no vertebral body and allows the head to nod. The axis has the dens and allows the head to rotate.
  • Unique feature of cervical vertebrae

    Cervical vertebrae have a transverse foramen, which is unique to this region.
  • Composition of the sacrum and coccyx

    The sacrum consists of 5 fused vertebrae and joins with the coccyx to form the tailbone.
  • Primary and secondary spinal curves

    Primary curves are the thoracic and sacral curves present at birth. Secondary curves are the cervical and lumbar curves developed later.
  • Articulations of the clavicle ends

    The sternal end articulates with the manubrium of the sternum. The acromial end articulates with the acromion of the scapula.
  • Radius and ulna articulations with the humerus

    The radius articulates with the capitulum of the humerus. The ulna articulates with the trochlea of the humerus.
  • Heads of radius and ulna

    The head of the radius is proximal. The head of the ulna is distal.
  • Classification of the patella

    The patella is a sesamoid bone. The bottom of the patella forms the apex.
  • Position of fibula and tibia

    The fibula is lateral and the tibia is medial in the lower leg.
  • Bones forming the heel and ankle

    The calcaneus makes up the heel bone. The talus articulates with the tibia and fibula to form the ankle.
  • Types of joints and examples

    Diarthrotic joints are freely movable (e.g., elbow, wrist, ankle). Amphiarthrosis joints are slightly movable (e.g., pubic symphysis, between tibia-fibula). Synarthrotic joints are immovable (e.g., sutures of the skull).
  • Definition of diarthrotic joints

    Diarthrotic joints are freely movable joints allowing a wide range of motion.
  • Definition of amphiarthrosis joints

    Amphiarthrosis joints are slightly movable joints that allow limited movement.
  • Definition of synarthrotic joints

    Synarthrotic joints are immovable joints that provide stability.
  • Ligaments of the knee joint

    Key ligaments include the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), fibular collateral ligament, and tibial collateral ligament.
  • Menisci of the knee

    The knee contains the medial meniscus and lateral meniscus, which cushion and stabilize the joint.
  • Function of the quadriceps tendon in the knee

    The quadriceps tendon connects the quadriceps muscles to the patella, aiding in knee extension.