caption: The image shows a black and white drawing of a heart with the words "intralobular vein" written on it. The heart is divided into two sections, the left and right ventricles, and the pulmonary artery. The left ventricle is located on the left side of the heart, while the right ventricular vein is on the right side. The text is written in a bold font and is located at the bottom of the image.