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Bones
Function and structure of bones and components
26
Anatomy
Undergraduate 1
06/17/2012

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Cards

Term
What are canaliculi?
Definition
A medical term used to describe small passageways
Term
What is an Osteon?
Definition
The basic unit in the structure of compact bone
Term
What is calcification?
Definition
-The process of depositing calcium salts
-Occurs during bone ossification and in other tissues
Term
What are the two main forms of ossification?
Definition
Endochondral ossification
Intramembranous ossification
Term
What are the two major functions of osteocytes?
Definition
To maintain protein and mineral content of matrix
To help repair damaged bone
Term
What are Sesamoid Bones?
Definition
Small and flat, develop inside tendons near joints of knees, hands and feet.
Term
What are Endosteum?
Definition
An incomplete cellular layer that lines the medullary cavity.
Term
What is Osteosarcoma?
Definition
A type of cancer that starts in the bones
Term
What are Osteoclasts?
Definition
Cells that remove and recycle bone matrix
Term
What are Osteoblasts?
Definition
Produces new bone matrix in a process called ossification, or osteogenesis.
Term
What are Sutural Bones?
Definition
Small, flat, and irregular shaped bones that are between the flat bones of the skull.
Term
What is Spongy bone?
Definition
Consists of an open network of struts and plates that resembles latticework with a thin covering, or cortex, of compact bone
Term
What is an Osteon?
Definition
The basic unit in the structure of compact bone
Term
Bone consists of what 4 type of cells?
Definition
Osteocytes
Osteoblasts
Osteoprogenitor cells
Osteoclasts
Term
What are the four steps in repairing a fracture?
Definition
1. Bleeding
2. Cells of the endosteum and periosteum
3. Osteoblasts
4. Osteoblasts and osteocytes remodel the fracture for up to a year.
Term
What is Epiphysis?
Definition
The expanded area located at each end of the bone.
Term
What is Compact Bone?
Definition
It forms a sturdy layer that surrounds the medullary cavity.
Term
What is osteolysis?
Definition
An erosion process that is important in the regulation of calcium and phosphate concentrations in body fluids.
Term
What is calcitonin?
Definition
A hormone that inhibits osteoclast activity and increases the rate of excretion of calcium ions by the kidneys.
Term
What are Osteocytes?
Definition
Mature bone cells found in lacunae
Term
What are the two types of bone marrow?
Definition
Red Marrow
Yellow Marrow
Term
What does Red bone marrow create?
Definition
red and white blood cells
Term
What are the functions of the skeletal system?
Definition
protection of internal organs
body support
blood cell production
calcium homeostasis
Term
What is the function of calcitonin?
Definition
to decrease the level of calcium ion level in blood
Term
What is osteoporosis?
Definition
A condition in which the bone is riddled with holes
Term
The most abundant cell type in bone are?
Definition
Osteocytes
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