Studied by 10 people
What is the most obvious function of the skeleton?
Structural Support, supporting the weight of the body
What is the skeletal system composed of?
bones, cartileges, joints and ligaments and other connective tissues
What are the 5 primary functions of the skeletal system? Give a brief description
PBSMS Protection Blood Cell Productions Support Movement Storage
What is bone?
Supporting connective tissue
What gives bone its texture?
Calcium salts
What accounts for almost ⅔ of the weight of bone?
Calcium Phosphate
How many bones does a typical human skeleton have?
206
What are the 4 general shapes of bones? Give an example for each
Long - humerus Short - carpal Flat - Skull Irregular - Spine Vertebrae
What are the 2 types of bone tissue?
Spongy and Compact
What is a tendon?
connects bone to muscle
What is a ligament
connects bone to bone
What is the Periosteum?
Covers the outside of the bone
What is the endosteum
Covers inner surfaces of the bone and spongy bone of the marrow cavity
What is an Osteon?
Basic functional unit of compact bone
What is an Osteocyte?
Bone cells
What is an Osteoclast?
50+ nuclei, secretes enzymes and acid stuff that helps dissolve the bone - releases the stuff
What is an Osteoblast?
Involved in the production of new bone
What is Ossification?
Creation of new bone
What is lacunae?
Small pockets that are found between lamellae
What are lamellae?
Narrow sheets of calcified matrix
What are canaliculi?
Small channels radiate through the matrix, interconnecting lacunae and linking them to nearby blood vessels
Contain cytoplasmic extensions of the osteocytes
What is the Haversian Canal?
Also known as the central canal Where the osteocytes are arranged in layers around the canal The canal contains one or more blood vessels
What are trabeculae?
Rods or plates that have branches to create an open network The arrangement of spongy bone
Where is articular cartilage found?
Found in the epiphyses
Note
Flashcard