QUESTIONS AND ANSWERS 71 



cervical artery, beneath the internal face of the mastoidohumeralis 

 muscle and extends close to the attachment of the sternomaxillaris 

 muscle. * 



Posterior mediastinal (see preceding question). 



Inguinal, the deep inguinal situated beneath the crural aponeu- 

 rosis and arch in the interstice between the adductor muscles of the 

 leg, along with the iliac vessels. The superficial inguinal are located 

 in front of the inguinal ring at the side of the sheath on. the track of 

 the subcutaneous abdominal artery. 



Popliteal, located behind the great sciatic nerve and gastroc- 

 nemius muscle, between the biceps femoris and the semitendinosus 

 muscles, and near the femoropopliteal artery. 



Precrural, located within the anterior border of the tensor fascia 

 lata, on the course of the circumflex iliac artery. 



Iliac, situated in the triangular space between the two branches 

 of the circumflex iliac artery. 



Axillary, beneath the anterior limb, inside the arm; one group 

 is near the ulnar articulation, the other, behind the brachial vessels, 

 near the common insertion of the teres major and latissimus dorsi 

 muscles. 



Bronchial (see preceding question) . 



State the approximate number of mesenteric lymph-glands. 

 About thirty in number. 



Neurology 



The nervous system is divided into two great parts, the cerebro- 

 spinal and the sympathetic. The cerebrospinal system consists of 

 the brain, spinal cord, ganglia and nerves. The brain is the central 

 portion of the nervous system and is situated in the cranial cavity ; 

 the spinal cord is, in reality, a great extension of the brain through- 

 out the length of the spinal canal, from which emerge, at numerous 

 points, branches, nerves, upon which are noted enlargements, called 

 ganglia. The sympathetic system will be described in answer to a 

 question below. 



Name the membranes that cover the brain and describe the outer one. 



From within outward, pia mater, arachnoid and dura mater. 



The dura mater is a strong, fibrous membrane, adherent to the 

 bony walls. It gives off prolongations into the brain, forms de- 

 pressions for the venous sinuses and is prolonged on the nerves and 

 spinal cord. 



