Bukhinnan

Bukhinnan, also known as the peritoneum, is a large, thin membrane that lines the inside of the abdominal cavity and covers most of the abdominal organs. It is a serous membrane, meaning it secretes a lubricating fluid called peritoneal fluid. This fluid allows the organs to move and slide smoothly against each other during digestion and other bodily functions, preventing friction.

The peritoneum is divided into two layers: the parietal peritoneum and the visceral peritoneum. The parietal peritoneum lines the abdominal wall, while the visceral peritoneum covers the organs themselves, such as the stomach, intestines, liver, and spleen. The space between these two layers is called the peritoneal cavity.

In males, the peritoneal cavity is a completely closed sac. In females, it is not entirely closed as the fallopian tubes, uterus, and ovaries are in communication with the abdominal cavity through the openings of the fallopian tubes.

The peritoneum plays a crucial role in the immune system, acting as a barrier against infection. It also helps to support and anchor the abdominal organs in place. Inflammation of the peritoneum is called peritonitis, which can be a serious condition often caused by infection or injury.