Growing lettuce indoors is a great way to eat better and have fun growing your own food. Itâs also the fastest-growing indoor crop â you can actually see it grow from day to day! And thanks to indoor gardens like the AeroGarden, enjoying homegrown lettuce year round has never been easier. 1  Two types of harvesting.
The basic science, in brief: Primary bone healing is lead by the formation of a so-called cutting cone (consisting of osteoclasts at the front of the cone to remove bone and trailing osteoblasts to lay down new bone) across the gaps to form a secondary osteon.escribe the differences between primary and secondary bone healing. escribe the differences between primary and secondary bone healing. The two mechanisms of bone healing are primary bone healing and secondary bone healing. (THIS IS JUST LIKE SKIN: you can sew it up or it can scab.).
A primary ossification center is the first area of a bone to start ossifying. It usually appears during prenatal development in the central part of each developing bone. In long bones the primary centers occur in the diaphysis /shaft and in irregular bones the primary centers occur usually in the body of the bone.he first step in ossification of the cartilage is that the cartilage cells, at the point where ossification is commencing and which is termed an ossification center, enlarge and arrange themselves in rows.