Skeletal System

• 206 - number of bones in an adult
• Axial - region of bones that is made up of your head, neck, back and chest
• Appendicular - region of the bones that is made up of your limps and pelvis
• The four classification of bones according to shape are: Long, short, flat, and irregular.
• C-shaped - is the primary curvature of the spine that is typical in a newborn
• Secondary - curvature of the spine present in the cervical and lumbar areas
• Examples of abnormal spinal curvatures include: kyphosis, scoliosis, and lordosis.
• Scoliosis - an S-shaped or sideways abnormal curvature or the spine.
• Kyphosis - an abnormal spinal curvature that causes the head to bow down and gives the back a hump
• Lordosis - an abnormal spinal curvature where the lower back is extremely curved towards the anterior region of the body
• Male - The gender that has a more narrow and long sacrum in terms of the pelvis
• Female - The gender that has a broader pubic arch and has a wider pelvic outlet
• Yellow Marrow - Found in long bones, stores fat
• Joint - where to bones come together
• Tendons - connect bone to muscle
• Ligament - connects bone to bone
• Osteocytes - bone cells that break down bone
• Osteoblasts - makes bone tissue
• Endosteum - internal bone lining
• Periosteum - External bone lining
• Ossification - bone formation
• Cartilaginous - connecting joints with no synovial fluid, cushioned by cartilage. semi-moveable
• Fibrous - dense fibrous connective tissue with strong collagen fibers with hold the joints firmly with no synovial cavity in skull joints
• Synovial - joint found between bones that move against each other, such as the joints of the limbs
• There are three types of joints according to range of motion: fibrous, cartilaginous and synovial