<prompt> True about patella isBlood supply is by genicular anastomosisOne ossification centre at 3-6 yearsMedial surface attaches to tensor fascia lataRectus femoris attachment is proximal to vastus intermedius  <response>: PATELLA:- Largest sesamoid bone developed in tendon of quadriceps femoris.Triangular shape.Apex, 3 borders sup, lateral and medial, 2 surfaces anterior and posterior . Attachments:-1. Superior border base- rectus femoris ,vastus intermedius . Vastus intermedialis attached proximal to rectus femoris.2. Medial border- vastus medialis.3. Lateral border- vastus lateralis.4. Posterior surface- ligamentum patellae. Ossification:- several centers which appear during 3-6 years of age. Fusion complete at pubey.One or two centers at the superolateral angle may form separate pieces of bone, forming bipaite tripaite patella. Patella supplied by genicular anastomosis. 