Bones formed directly mesenchyme, without going through a cartilage stage first. Only bones that form this way are flat bones of the skull and mandible.
all bones of the skeleton below base of skull form by this process; begins in 2nd month of development and uses hyaline cartilage as models for bone construction.
Bone that grows within a tendon, ie. patella and sometimes in other areas of body
Bones that don't fit into other categories ie. Vertebra, Facial Bones
Covers bone ends to reduce friction at joints, thin hyaline cartilage layer that covers epiphyses of bones in synovial joints
A complex consisting of a central canal and its concentric rings.
Tiny canals which radiate outward from central canal to all lacunae. Form a transportation network that brings nutrients to and metabolic wastes from cells.
Tiny cavities in the matrix of bone tissue where osteocytes are formed and reside. Arranged in concentric circles called lamallae around central canals. Carry blood and lymph vessels and nerves to bone tissue.
Mature Bone cell
indentations of bone
Growth, out from the bone. Bump
Lines the medulla cavity of long bones.
Cavity in Bone shaft. In adults used for fat storage; In infants, sight of red blood call production
remnant of epiphyseal plate
flat plane of hyaline cartilage thats seen in young growing bone. Closes up by end of puberty. How long bones get longer.
Ends of long bones. Thin layer of compact bone enclosing an area of spongy bone. Covered by articular cartilage
Fibrous, connective tissue membrane that covers the bone. Has sharpeys fiber that connect it to underlying bone tissue
Shaft of a long bone.
Communication Pathway from outside of bone to its interior. Run into the compact bone at right angles to the shaft.
Most inferior. Made up of dead Chondrocytes because matrix around them has calcified. Osteoclasts dissolve calsified cartilage and osteoblasts move in a lay down bone matrix.
Zone of maturation of chondrocytes. 3rd one down
Consists of Chondrocytes dividing to replacce those that are at the diaphyseal surface of the epiphyseal plate. 2nd one down
Cells dont function in bone growth but anchor plate to epiphyses.
Microscopic units of spongy bone. Lattice work of spongy bone tissue
Determines when or if bone is to be broken down or formed and stresses of muscle pull and gravity determine where.
Blood cells rupture and cause a blood filled swelling.
Treatment of bone injury with Surgery Performed and bone ends secured by wire or pins
When bone ends are coaxed back into position by a physicians hands
When broken ends of bone penetrate the skin.
When Bone breaks cleanly but does not penetrate the skin
Functions of Bone
Support, Protection, Assist in Movement. Fats get stored in internal cavities. Blood cell formation, hematopoiesis occur in marrow.
Small needle-like pieces of bone with lots of empty space in between
Dense, Smooth, Homogenous bone
Area between Epiphyses and diaphyses of bone.
Large Foramen, Passage way.
Narrow Cleft-like Opening between adjacent parts of bone thru which blood vessels and nerves may pass
Projection that contacts another bone. Large, Round articular eminence.
Flat, smooth or nearly flat articular surface where joints are formed.
Perforation through bones which blood vessel, nerves, or ligaments pass.
Thin layers of compact bone with spongy bone in between. Skull bones, ribs, sternum
Thoracic Sacral Curves
Primary Curves. There @ birth. Known as Kiphotic Curves.
When bone is splintered, or broken into peices at the site of impact, and smaller bone fragments lie between the two main fragments