Table of Contents
What are the crus of the diaphragm?
A tendinous structure, the crus of diaphragm, extends from the diaphragm and attaches to the vertebral column. The right and the left crus (pl. crura) form a tether which helps in muscular contraction. They are called crus owing to their leg-shaped appearance (crus is Latin for leg).
Which crus of diaphragm is longer and why?
The right crus is stronger, broader and longer than the left, and originates from the anterolateal surface of the first three lumbar vertebral bodies and intervertebral discs (IVDs). The left crus arises from similar surfaces of the upper two lumbar vertebrae and the intervening IVD.
What is the crus in anatomy?
Medical Definition of crus 1 : the lower or hind limb especially between the knee and the ankle or tarsus : shank. 2 : any of various anatomical parts likened to a leg or to a pair of legs: as. a : either of the diverging proximal ends of the corpora cavernosa.
Why is right crus longer?
The right crus, larger and longer than the left, arises from the front of the bodies and intervertebral fibrocartilages of the upper three lumbar vertebrae. The left crus arises from the corresponding parts of the upper two lumbar vertebrae only.
What are the 3 diaphragm openings?
There are a number of openings in the diaphragm through which structures pass between the thorax and abdomen. There are three large openings — one for the aorta, one for the esophagus, and one for the inferior vena cava (the caval opening), plus a series of smaller ones.
What passes through left crus of diaphragm?
The left inferior phrenic artery ascends toward the left diaphragmatic crus associated with the inferior surface of the diaphragm. From here is passes posterior to the esophagus and runs anteriorly along the edge of the esophageal hiatus.
What is the function of crus?
These massive crossed fibres, called crus cerebri, form the middle cerebellar peduncle and serve as the bridge that connects each cerebral hemisphere with the opposite half of the cerebellum. The fibres originating from the cerebral cortex constitute the corticopontine tract.
What is crus in male reproductive system?
The crural (roots) of the corpora cavernosa attach at the under surface of the ischiopubic rami as two separate structures. Such anatomy prevents the erect penis from sinking into the perineum when faced with an axially-oriented vaginal compressive load during intercourse.
What is the crus?
What passes through right crus?
Abdominal surface of the diaphragm in a cadaver: The esophageal hiatus passes through the right crus of the diaphragm. The foramen of the inferior vena cava traverses through the central tendon, while the aortic hiatus passes behind the diaphragm.
What is left and right crus?
The crus of diaphragm (pl. crura), refers to one of two tendinous structures that extends below the diaphragm to the vertebral column. There is a right crus and a left crus, which together form a tether for muscular contraction. They take their name from their leg-shaped appearance – crus meaning leg in Latin.
What are the 3 structures that pass through the diaphragm?
Three important structures pass through the diaphragm: the esophagus, and the two main blood vessels of the lower half of the body, the inferior vena cava, and the descending aorta.
Where is the crus found?
In anatomy, the term crus refers to the lower leg, particularly the leg from the knee to the ankle.