QUESTIONS AND ANSWERS 85 



In its various folds and duplicatures, it forms ligaments, mesen- 

 teries and omenta as follows : falciform ligament from the umbilicus 

 to the middle lobe of the liver; the common ligament of the liver 

 which surrounds the posterior vena cava ; the cardiac ligament that 

 envelops the termination of the oesophagus ; the gastrohepatic liga- 

 ment or omentum attaches the stomach to the posterior fissure of the 

 liver and separates at the lesser curvature of the stomach to envelop 

 the same, joining again at its greater curvature. This fold is 

 called the great omentum and also the gastrocolic omentum, because 

 by its posterior border it is extended around the termination of the 

 large colon. A reflection from the stomach to the spleen is called 

 the gastrosplenic omentum. Behind the stomach, there is a small 

 opening in the great omentum, which comm.unicates with the peri- 

 toneal cavity, called the foramen of Winslow. Posteriorly, the 

 great omentum is continued as the mesentery proper, being reflected 

 over the small and large intestines, forming their mesenteries, the 

 ligaments of the bladder, broad ligaments of the uterus, and then 

 from the rectum and front of the bladder is reflected to the superior 

 and inferior abdominal wall, forming the parietal layers. The in- 

 ferior parietal layer continues forward, descends into the scrotum 

 through the inguinal canal to envelop the testicles, and is continued 

 forward to form the suspensory ligament of the liver. The superior 

 parietal layer passes beneath the kidney, forms the mesenteries and 

 is continued to the diaphragm. 



Respiratory Organs 

 Name the sinuses of the head. 



The sinuses of the head are arranged in pairs, five on each side as 

 follows: the frontal, supermaxillary, sphenoidal, ethmoidal and 

 inferior maxillary. 



Compare the frontal sinus of the ox with that of the horse as regards 

 position, structure and size. 

 In the ox, the frontal sinuses are prolonged into the horn cores 

 and into the parietal and occipital bones. They envelop the anterior 

 and superior part of the cranium and form a double wall to this 

 cavity. They are, therefore, much larger and situated more supe- 

 riorly than in the horse. In the horse, the sinus communicates with 

 the superior maxillary sinus by a vast opening in the thin bony 

 partition, but in the ox, no such communication exists. 



Describe the larynx. 



The larynx is a cartilaginous box, situated in the intermaxillary 

 space between the two corona of the os hyoides and fixed to these 



