1an organ made up of several different tissues working together
Bone
2the entire framework of bones and their cartilages constitute of
Skeletal system
3the study of bone structure and the treatment of bone disorders is referred as
osteology
6give 5 functions of skeletal system
support, protection, assistance in movement, storage of minerals, blood cell production or SPASB
7a bone that one has greater length than width
long bone
8(growing between) bone's shaft or body. Long,cylindrical and main portion of the bone.
Diaphysis
9(growing over) the proximal and distal ends of the bone.
Epiphyses- plural Epiphysis- singular
10(between) regions between the diaphysis and epiphyses
Metaphyses
11(growth plate) a layer of hyaline cartilage that allows the diaphysis of the bone to grow in legth
epiphyseal
12thin layer of hyaline cartilage covering the part of the epiphysis
Articular Cartilage
13Tough connective tissue sheath and its associated blood supply
Periosteum
15marrow cavity, hollow, cylindeical space within the diaphysis that contains fatty yellow bone marrow
Medullary Cavity
16Medulla means
marrow, pith
17a thin membrane that lines the medullary cavity.
Endosteum
19what is the extracellular matrix?
it is about 15% water, 30% collagen fibers, 55% crystallized mineral salts.
20what is the most abundant mineral salt?
calcium phosphate
21it combines with another mineral salt, calcium hydroxide to form crystals of?
hydroxyapatite
22mineral crystallizes and the tissue hardens
calcification
23bone building cells
osteoblasts
24depends on the crystallized inorganic mineral salts
Bone's hardness
25depends on its collagen fibers
Bone's Flexibility
26Bone cells are called?
osteoclasts
274 types of cells present in bone tissue
ostoeprogenitor>osteoblast>osteocytes>osteoclasts
28unspecialized bone stem cells derived from mesenchyme
Osteoprogenitor cells
29synthesize and secrete collagen fibers and other organic components (bone building cells)e
osteoblasts
30(mature bone cells) main cells in bone tissue and maintain ita daily metabolism
osteocytes
31huge cells derived from the fusion of as many as 50 monocytes
osteoclasts
32breakdown of bone extracellular matrix. normal development, maintenance and repair of bone.
Bone Resorption
33Bone is not completely solid but has many small spaces between its cells and extracellular matrix components
True
34some spaces serve as channels for blood vessels that supply bone cells with nutrients. other spaces act as storage areas for red bone marrow.
True
3580% of skeleton is?
compact bone
3620% of skeleton is?
spongy bone
37Strongest form of bone tissue. Provides protection and support and resists the stresses.
Compact bone tissue
38Repeating structural units called osteons or?
Haversian systems
39circular plates
Concentric lamellae
40(small channel) filled with extracellular fluid
Canaliculi
41Between the concentric lamellae are small spaces called?
42Trabecular or cancellous bone tissue. Does not contains osteons.Always located in the interior of a bone protected by a covering of compact bone
Spongy Bone tissue
43Filled with red bone marrow and yellow bone marrow
Macroscopic spaces
44Spongy bone is light, which reduces the overall weight of a bone
45Passes through a hole in compact bone called the nutrient foramen
Nutrient artery
46Enter the metaphyses of a long bone
Metaphyseal arteries
47Enter the epiphyses of a long bone
Epiphyseal arteries
48On going replacement of old bone tissue by new bone tissue
Bone remodeling
49The removal of minerals and collagen fibers from bone bt osteoclasts
Bone resorption
50The addition of minerals and collagen fibers to bone by osteoblasts
Bone deposition