Table of Contents
What are the contents of the rectus sheath?
The rectus sheath, also called the rectus fascia, is formed by the aponeuroses of the transverse abdominal and the internal and external oblique muscles. It contains the rectus abdominis and pyramidalis muscles.
What is enclosed in the rectus sheath?
The rectus sheath encloses the rectus abdominis and pyramidalis muscles and forms an important component of the anterior abdominal wall.
What the rectus sheath and what is its function?
The function of the rectus sheath is to protect the muscles and vessels which it encloses. In addition, keeping the rectus abdominis and pyramidalis muscle together helps in providing maximal compression of and support to abdominal viscera.
How many layers does the rectus sheath have?
The rectus sheath is made up of two parts, known as the posterior sheath and the anterior sheath. These sheaths are made of fibers of the transversus abdominis, internal abdominal oblique (IAO), and external abdominal oblique (EAO), which are muscles of the abdomen.
What is sheath in anatomy?
(shēth), 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure.
Which two arteries meet within the rectus sheath?
Superior Epigastric Arteries Descends within the rectus sheath (posterior to the rectus muscle but anterior to the posterior rectus sheath) to form an anastomosis with the inferior epigastric artery.
Where is the rectus sheath?
It covers the anterior and posterior surfaces of the upper three-quarters of the rectus abdominis muscle, and the lower quarter of its anterior surface.
How is the rectus sheath made?
What are the six-pack muscles called?
rectus abdominis
rectus abdominis – slung between the ribs and the pubic bone at the front of the pelvis. When contracting, this muscle has the characteristic bumps or bulges that are commonly called ‘the six pack’. The main function of the rectus abdominis is to move the body between the ribcage and the pelvis.
What is difference between omentum and peritoneum?
The main difference between omentum and peritoneum is that omentum is an abdominal structure formed from the visceral peritoneum with a structure similar to the mesentery whereas peritoneum is the thin, serosal membrane, which lines the abdominal and pelvic cavities, covering most of the viscera.
What is a mesentery?
The mesentery is a fold of membrane that attaches the intestine to the abdominal wall and holds it in place. Mesenteric lymphadenitis is an inflammation of the lymph nodes in the mesentery.
What is rectus muscle?
The Rectus Abdominis makes up the top layer of your abdominal muscles, commonly referred to as your “six-pack.” It is two flat and parallel muscles separated by linea alba (a connective tissue).
What is mesentery vs peritoneum?
The peritoneum is the largest serous membrane of the human body, with a complex structure consisting of ligaments, the greater and lesser omentum, as well as the mesenteries. A mesentery is a double layer of peritoneum, and attaches the vasculature and nerves to the intraperitoneal organs.
What means omentum?
(oh-MEN-tum) A fold of the peritoneum (the thin tissue that lines the abdomen) that surrounds the stomach and other organs in the abdomen.