University:
Kentucky State University
Course:
BIO 301 | Human Anatomy
Academic year:

2024
Views:

261

Pages:

8
Author:

kundgetanufv

Transverse colon Transverse Colon Location and Description • The transverse colon is about 15 in. (38 cm) long • extends across the abdomen • occupying the umbilical region. • It begins at the right colic flexure below the right lobe of the liver • Hangs downward • Suspended by the transverse mesocolon from the pancreas • It then ascends to the left colic flexure below the spleen. • The left colic flexure is higher than the right colic flexure and is suspended from the diaphragm by the phrenicocolic ligament . • Taenia coli, sacculation & appendeces epiplolca are present The transverse mesocolon= mesentery of the transverse colon • suspends the transverse colon from the anterior border of the pancreas . • The mesentery is attached to the superior border of the transverse colon • The posterior layers of the greater omentum are attached to the inferior border . • The position of the transverse colon is extremely variable and may sometimes reach down as far as the pelvis. Relations of Transverse colon • Anteriorly: - The greater omentum - The anterior abdominal wall (umbilical and hypogastric regions) • Posteriorly: - The second part of the duodenum - The head of the pancreas The coils of the jejunum and ileum Blood Supply of transverse colon • Arteries: - The proximal two thirds are supplied by the middle colic artery→ a branch of the superior mesenteric artery. The distal third is supplied by the left colic artery→ a branch of the inferior mesenteric artery . Veins - The veins correspond to the arteries and drain into the superior & inferior mesenteric veins. Lymphatic Drainage of transverse colon • The proximal two thirds drain→ the colic nodes and then into the superior mesenteric nodes • The distal third drains → the colic nodes → the inferior mesenteric nodes. Nerve Supply of transverse colon • The proximal two thirds are innervated by sympathetic and vagal nerves through the superior mesenteric plexus • The distal third is innervated by sympathetic and parasympathetic pelvic splanchnic nerves through the inferior mesenteric plexus.