Arteries These arteries run between the aponeurosis and skin and anastomose with each other. The scalp is supplied by branches of the external and internal carotid arteries. ECA: superficial temporal, posterior auricular, occipital arteries ICA: supraorbital, supratrochlear arteries Nerves Cutaneous nerves follow the blood vessels. The scalp is supplied: posteriorly by the greater occipital and third (least) occipital nerves, branches of the posterior rami of … Continue reading Scalp arteries & nerves

Peritoneal gutters and pouches are spaces in the abdominal cavity formed or bounded by peritoneum. Gutters In the abdomen, two paracolic and two paramesenteric gutters are the main peritoneal gutters. The left and right paracolic gutters lie on the posterior abdominal wall alongside and lateral to the ascending and descending transverse colons. The paramesenteric gutters (or infracolic spaces) are spaces between the colon and the … Continue reading Peritoneal gutters and pouches

The mesentery is a double fold of parietal peritoneum that connects the visceral peritoneum of the intestines to the parietal peritoneum of the posterior abdominal wall (where it arises as the mesenteric root). Not only does it hold the intestines in place, but many blood and lymph vessels plus nerves run in between the peritoneum layers to supply the abdominal organs. Besides the small intestine, … Continue reading Mesentery

Omenta are formed from layers of visceral peritoneum folded on itself. In the abdomen, there is a lesser and a greater omentum. Lesser omentum The lesser omentum (which can be divided into the hepatogastric and hepatoduodenal ligaments) is formed by the anterior and posterior layers of the stomach’s visceral peritoneum folding together at the lesser curvature into a double sheet that extends towards the liver. … Continue reading Omenta

The peritoneum is the serous membrane that lines the abdominal cavity. It includes a parietal and a visceral layer, where the parietal peritoneum which lines the abdominal wall is folded inwards to form the visceral peritoneum that covers the visceral organs. Areas of peritoneal folds form peritoneal reflections that are the basis of several structures in the body, including omenta, mesenteries, gutters and pouches. Continue reading Peritoneal reflections