The common bile duct (or sometimes called the bile duct for short) enters the gastrointestinal tract at the

1 and 6 for apex

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.