Final answer:
The Quadrate lobe is on the inferior surface of the liver and sits next to the gallbladder, often referred to as the medial segment of the left lobe. The liver's structure includes a larger right lobe and a smaller left lobe, further divided into the quadrate and caudate lobes, surrounded by ligaments and composed of functional units called hepatic lobules.
Step-by-step explanation:
The Quadrate lobe is located on the inferior surface of the liver and sits next to the gallbladder. It is sometimes referred to as the medial segment of the left lobe. The liver itself is divided into two primary lobes: a large right lobe and a much smaller left lobe. Additionally, the right lobe is further subdivided into an inferior quadrate lobe and a posterior caudate lobe. These lobes are defined by internal features within the liver's structure.
The liver, which is the largest gland in the body and one of the most important organs, is divided into these lobes and smaller units called lobules. The liver is protected by five peritoneal folds known as ligaments, including the falciform ligament and ligamentum teres hepatis, which separate the right and left lobes anteriorly and are remnants of the umbilical vein. The hepatic lobules, the functional units of the liver, consist of liver cells called hepatic cells or hepatocytes, which carry out the various metabolic functions of the liver.