1. 2. 3. 4. To protect your body and give it shape. To protect your internal organs. To provide a scaffolding for your muscles, allowing you to move. To store minerals and make blood cells. Bones are made up of bone cells and tissues Hard, dense and smooth outer materials, which are made of calcium, give bones there shape and strength. *Axial Skeleton - 5 parts; the human skull, the ossicles of the middle ear, the hyoid bone of the throat, the rib cage (including the sternum) and the vertebral column. *Appendicular Skeleton - These are the parts of the skeleton that make up your limbs. The word appendicular is the adjective of the noun appendage, which itself means a part that is joined to something larger.
Skull Ear Ossicles Vertebral Column Rib Cage &Sternum Hyoid Bone Skull is made of 29 tightly joined bones. It is also called cranium. It protects the brain, eyes, nose and ears. The vertebral column is also called the backbone. It is found in the middle of the human trunk. It has small bones called vertebrae or vertebras, which protects the spinal cord. vertebrae# Cervical 7 Thoracic 12 Lumbar 5 The rib cage are made up of 25 bones. The straight bone in the center is the sternum also called the breastbone to which the ribs are attached.
The pectoral girdle is made of the clavicle or collarbones and two shoulder bones or shoulder blades. Collarbones run from shoulder to shoulder. Pectoral girdle Pelvic girdle Forelimb Hind Limb The pelvic girdle is made up of two hip bones
The forelimb is made of the upper and lower arm bones, the wrist bone, the palm bones, and the finger bones. In long bones the epiphysis region contains the spongy bone and caps the long bones. The growth plates are found between the epiphysis and the diaphysis region. The hind limb is made of the thigh bone, the knee cap, the shank bone, the ankle bone, the bones of the sole, and the toe bones. A bone is made up of salts, water, and tissue. Inside a bone there is a jelly substance called bone marrow. Bone marrow produces blood cells for the body.
Compact Bone Solid layer Outer layer Very strong Dense calcium network Spongy Bone Lightweight, STRONG Full of holes (for blood vessels) Middle layer Osteoblast - Bone building cells Osteoclast Bone dissolving cells Osteocytes Osteoblast that are trapped in bones Epiphysis regions at the end of long bones 3D printing of Casts (3m 18s Language) https://www.youtube.com/watch? v=trtu1nzubti Most bone formation begins during fetal development, though a few short bones begin their primary ossification (making bone) after birth.
Irregular Bones = spinal column (vertebrae) Flat Bones = ribs, skull Long Bone = in arms & legs Short Bone in feet & hands Connective tissue that holds bones together @ joints Stretchy
Function: allow for movement or to create a seal between 2 bones Definition: any place where 2 bones meet Can give a little, more flexible But usually don t move much Example: Ribs NO movement/motion Example: Skull Bones in the skull are fused together to seal brain inside Bones glide back & forth past each other Lots of motion Many types Hinge Pivot Ball and Socket
Motion: twist a door knob Example: wrist, where the spine and the skull meet. Motion: throwing a baseball Example: shoulder, thigh bone to hips Motion: open and close only one way Example: knee, elbow Osteo- = bone -porosis = break down, porous, holes Loss of density in bone Calcium network thins Bones become brittle Effects women more than men
Immovable skull joints are not entirely fused in infants Easier to squeeze big head out of mother Cushions joints so bones don t grind Arthritis = cartilage covering bones in joints wears down which causes pain and limits movement Bones missing the CALCIUM network! Flexible, soft Example: ears, nose, lining of joints All bones start out as cartilage Add calcium to harden = OSSIFY