Basic surgical instruments. Preparation of the patient and the surgeon. Dieresi, excision, cents, hemostasis, biopsy. Synthesis of the soft tissues. Biology of fractures, osteosynthesis methods. Rupture of the anterior cruciate ligament in dogs. Hip surgery in dogs. Arthroscopy and laparoscopy. Dressings, bandages, drainage, catheterizations. Luxations, arthrodesis, suture on muscles and tendons. Thoracotomy. Treatmento of pneumothorax and diaphragmatic rupture. Laparotomy. Inguinal, umbilical and perineal hernia. Prolapse of the rectum, perianal fistulas. Gastrostomy, enterotomy, splenectomy. Urethral and bladder lithiasis, nephrectomy. Urethrotomy, urethrostomy.