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Bone Structure

Chapter 7

What is compact bone? dense connective tissue that white, smooth, and soild
What is spongy bone? internal to compact bone and porous
Where is hyaline cartilage? attaches to ribs to sternum, covers the ends of some bones, and cartilage within growth plates.
What is fibrocartilage? weight bearing cartilage that withstands compression.
Where is fibrocartilage? interverebrak discs, pubic symphysis, knee joints
What is hemopoiesis? The process of blood cell production
Where does hemopesis occur? Red bone marrow connective tissue
What is stored within the bone? minerals, calcium, and phosphate
What is a long bone? Greater in length than width, elongated cylindrical shaft.
What is the most common bone shape? Long bones
Where are long bones found? Upper limbs, lower limbs,
What is the shaft of a long bone called? diaphysis
The hollow space within the diaphysis is called? medullary
What is contained in the medullary? Red bone marrow in childern, yellow bone marrow in adults
What is the epiphysis? The expanded knobby region at the end of each long bone
What is the proximal epiphysis? End of the bone closet to the trunk
What is the distal epiphysis? End of the bone farthest from the trunk
What is the epiphysis covered in? articular cartilage
What is the metaphysis? the mature region of the bone between the diaphysis and epiphysis
What are the four types of cells found in bone connnective tissue? osteoprogenitor, osteoblasts, osteocytes, and osteoclasts
What is a osteoprogenitor cell? a stem cell derived from mesenchyme. Located in periosteum and endosteum
What is a osteoblasts? formed from osteoprogentior stem cells. Positioned side by side on bone surfaces.
What is a osteoctye? mature bone cells derived from osteoblasts that have lost their bone forming ability.
What is a osteoclast? large, multi nuclear, phagocytic cells. Derived from fused bone marrow cells
What is the purpose of inorganic and organic substances in the bone? allows bone matrix to function optimally
What is endochondral ossification? begins with hyaline cartilage model and produces most of the bones of the skeleton
How many steps in endochondral ossification? 6
Name the steps 1-4 1-Fetal hyaline cartilage model develops 2-Cartilage calcifies and a periosteal bone collar forms 3- The primary ossification center forms in the diaphysis 4-Secondary ossification centers form in the epiphyses
Name steps 5 and 6 5- Bone replaces almost all cartilage expect articular and epiphyseal 6-Lengthwise growth continues until epiphyseal plates ossify and form epiphyseal lines
What is the growth of the epiphyseal plate? Growth of cartilage between the boundaries of the diaphysis and epiphysis in childhood
Created by: rpill