I notice a bulb at the end of the fallen planted hair, i want to know if that is a follicle?

It's always a good idea to check in with your surgeon.  At 25 days from surgery, this shedding of scabs along with hairs that contain the "bulb" is fine.  The cells needed to grow your new hair are already embedded in place and you will begin to see new growth in about 3-6 months.  

These hairs will sooner or later shed. They are never a problem for new hairs that start to grow. Usually, there is a lag time between the time the hairs shed (2-8 weeks) and the time the new hair grows (3-8 months). IF for any reason, there is an overlap between the two, pay no attention to it for when the new hair grows, the old hairs from the grafts that may persist beyond 8 weeks, will eventually shed