Why is one collarbone bigger than the other?
Hear this out loudPauseIf one shoulder and that collarbone is higher, there are a number of muscles that could be pulling your shoulder up towards your head – upper traps, scalenes, levator scapula. If one collarbone is higher and the other is lower, you may have a tilt further down the body – possibly in your ribs, lower back, or side.
How does bone remodeling and appositional growth take place?
Osteoblasts replace cartilage with bone. Appositional growth is the increase in the diameter of bones by the addition of bone tissue at the surface of bones. Bone remodeling involves the processes of bone deposition by osteoblasts and bone resorption by osteoclasts. Bone repair occurs in four stages and can take several months.
When does bone formation and development take place?
Bone Growth and Development. Ossification, or osteogenesis, is the process of bone formation by osteoblasts. Ossification is distinct from the process of calcification; whereas calcification takes place during the ossification of bones, it can also occur in other tissues. Ossification begins approximately six weeks after fertilization in an embryo.
How are chondrocytes affected by appositional growth?
They also increase in width through appositional growth. Chondrocytes on the epiphyseal side of the epiphyseal plate divide; one cell remains undifferentiated near the epiphysis, and one cell moves toward the diaphysis. The cells, which are pushed from the epiphysis, mature and are destroyed by calcification.
How does calcification of cartilage lead to spongy bone?
This calcification prevents diffusion of nutrients into the matrix, resulting in chondrocytes dying and the opening up of cavities in the diaphysis cartilage. Blood vessels invade the cavities, and osteoblasts and osteoclasts modify the calcified cartilage matrix into spongy bone.