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.).
Microscopic examination of bone shows two varieties: 1. Primary, immature or woven bone. In addition to irregular array of collagen fibres, other characteristics of primary bone tissue are a lower mineral content and a higher proportion of osteocytes than that in secondary bone tissue. The newly formed bone during development or during healing process are woven bone.