98 VETERINAEY STATE BOAED 



Its fibrous coat sends prolongations into its structure, as in the 

 spleen. Its parenchyma is divided into lobules which contain vesi- 

 cles, lined with polygonal cells, and contains albuminous matter. 

 It is a very vascular organ, receiving its supply from the thyro- 

 laryngeal branch of the carotid artery. Nerve supply from the 

 first and second cervical and sympathetic. 



What is the thymus gland ? Where is it found ? 



It is a transitory organ which is found only in the foetus and 

 very young animals, and disappears a few months after birth. In 

 structure, it closely resembles the thyroid gland. It is situated 

 beneath the trachea, partly without and partly within the thoracic 

 cavity. 



What are the adrenals? Give location. 



The adrenals, or suprarenals, are two small bodies which resem- 

 ble somewhat the kidney in structure. They are applied to the lower 

 face of the kidney in front of the hilus and close to their inner 

 border. They have no excretory duct but have an internal secretion. 



Topographical Anatomy 



What structures are severed in tracheotomy? 



The skin, connective tissue, the cervical panniculus and stemo- 

 thyrohyoideus muscles and the trachea. 



State the difference between the foramen ovale and the foramen 

 magnum. 

 The foramen ovale is the opening between the auricles of the 

 heart, seen in the f cetus. 



The foramen magnum is the large orifice that passes through the 

 occipital bone and establishes a communication between the cranial 

 cavity and the spinal canal. 



Name the structures that w^ould be severed in amputating the hind 

 limb just below the tarsus. 

 Skin, subcutaneous fascia, flexor pedis perf orans and flexor pedis 

 perforatus tendons, the tendon of the oblique flexor of the meta- 

 tarsus, the anterior extensor of the phalanges, the lateral extensor 

 of the phalanges, the sheaths of these tendons, the plantar arteries, 

 the perforating pedal artery, the internal and external plantar 

 interosseous arteries, the accompanying veins of these arteries, 

 two rudimentary and one principal metatarsal bones. 



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