Exam 2 Slide show Skeletal Tissue (pt3) Flashcards
What is the nutrient foramen?
an opening in the diaphysis bone that allows for arteries/veins to nourish the medullary cavity
What is the nutrient groove?
the gradual groove on the exterior surface of the diaphysis that channels the arteries/veins into the bone.
What is responsible for a bones tensile strength
collagen
Which bone makes up the bulk of the diaphyses?
Compact bone
Which bone tissue, resists stress produced by weight and movement?
Compact bone
What is the haversian system?
units of bone tissue; aligned with lines of stress
What are the “tree rings” of bone matrix around the haversian canals?
Concentric lamellae
What is a unit of structure for bones called?
Osteon
How do osteocytes that are confined within the bone matrix some distance from the nearest blood vessel obtain their nutrients and get rid of their waste products?
Via diffusion through the canaliculi
. Is the term “circumferential lamellae” synonymous with the term “inner circumferential lamellae”? Explain.
No, the inner circumferential lamellae encircles the marrow cavity whereas circumferential lamellae encircles the entire bone just deep to the periosteum
What fills the spaces between haversian systems?
Interstitial lamellae
What are the longitudinal canals called?
Central canals
What are the transverse canals called?
Volkman’s canals (AKA perforating canals)
Which bone tissue does not have a haversian system?
Spongy Bone
How is spongy bone oriented?
Along lines of stress
Name the bones that are sites of hemopoiesis in adults
Red bone marrow in the spongy bone is the site of hemopoiesis (hip bones, ribs, sternum, vertebrae, ends of long bones )
Is the term “hemopoiesis” synonymous with the term “hematopoiesis”?
Yes
Bone is very vascular T/F
True
What is the process of converting a fibrous connective tissue or cartilaginous model into bone
Ossification
What are two methods of bone formation?
Intramembranous and endochondral
In regards to bone formation, which method is where bones form within a hyaline cartilage model?
Endochondral
In regards to bone formation, which method forms bones within a fibrous connective tissue membrane?
Intramembranous
Clavicle and most bones of the skull including mandible, form this way
Intramembranous
Is the term “calcification” synonymous with the term “ossification”?
Yes, calcification is a subcomponent of ossification.
During calcificaiton, what cell deposits hyroxyapatite into the matrix?
Osteocytes, over several days
