Cartilage Extracellular Matrix (ECM)
- so there are 3 types of catilage: hyaline, elastic and fibro. Hyaline cartilage is also known as articular cartilage and this type retains water and the ECm fibres lie transverse to compression loads to resist tension.
Bone ECM
- so bone is produced by osteoblasts and then maintained by entrapped osteocytes. The ECM fibres are aligned in spirals with osteon axis and are aligned to resist torsion. However, wile bone is strong in compressionit is relatively poor in tension.
Ossification:
-Intramembranous: the mesodermal cells are in layers/membranes forming in sheets that are associated with skin/fascia and are characterised by flat bones
- endochondral: this is ossificatino of a cartilage model in which the periosteum coms from the perichondrium and chondrocytes switch to produce osteoid both centrally at the midshaft and distally/proximally at both ends.
Growth of long bones
-cartilage plates are always between centres of ossification and are known as physes (growth plates) which allow the bone to grow in length until completion at which point all that will remain is a physeal scar. Osteoblasts in the periosteum allow growth in girth.
Red Marrow
- this is present both young and adults and is erythropoietic (blood forming). This marrow persists in the sternum throughout life and is he main site for aspiration and examination.
yellow marrow
- this marrow type is actually adipose tissue and is commonly found in adults. It is formed by degenerative changes in red marrow cells with fatty infiltration. Often it is interspersed with a few myelocytes (precursors of granular leucocytes of the blood).
Learn more:
Crash Course Skeletal System
WikiVet: The Skeleton
Knowledge Testing.
-what is red and yellow marrow?
- what are the three types of cartilage?
- describe the growth of a long bone.
Conceptual Understanding.
- how are bones constructed such that they are able to resist torsion?
- what features of articular cartilage enable it to resist tension on the joint?
- so there are 3 types of catilage: hyaline, elastic and fibro. Hyaline cartilage is also known as articular cartilage and this type retains water and the ECm fibres lie transverse to compression loads to resist tension.
Bone ECM
- so bone is produced by osteoblasts and then maintained by entrapped osteocytes. The ECM fibres are aligned in spirals with osteon axis and are aligned to resist torsion. However, wile bone is strong in compressionit is relatively poor in tension.
Ossification:
-Intramembranous: the mesodermal cells are in layers/membranes forming in sheets that are associated with skin/fascia and are characterised by flat bones
- endochondral: this is ossificatino of a cartilage model in which the periosteum coms from the perichondrium and chondrocytes switch to produce osteoid both centrally at the midshaft and distally/proximally at both ends.
Growth of long bones
-cartilage plates are always between centres of ossification and are known as physes (growth plates) which allow the bone to grow in length until completion at which point all that will remain is a physeal scar. Osteoblasts in the periosteum allow growth in girth.
Red Marrow
- this is present both young and adults and is erythropoietic (blood forming). This marrow persists in the sternum throughout life and is he main site for aspiration and examination.
yellow marrow
- this marrow type is actually adipose tissue and is commonly found in adults. It is formed by degenerative changes in red marrow cells with fatty infiltration. Often it is interspersed with a few myelocytes (precursors of granular leucocytes of the blood).
Learn more:
Crash Course Skeletal System
WikiVet: The Skeleton
Knowledge Testing.
-what is red and yellow marrow?
- what are the three types of cartilage?
- describe the growth of a long bone.
Conceptual Understanding.
- how are bones constructed such that they are able to resist torsion?
- what features of articular cartilage enable it to resist tension on the joint?