QUESTIONS AND ANSWERS 51 



viz., astragalus, ealcaneum, cuneiform magnum, cuneiform medium, 

 cuneiform parvum, and cuboid), one principal and two rudimentary 

 metatarsi, two sesamoids, suffraginis, coronas, pedis, and naviculare. 



Give the number of ribs, sternal and asternal, in the horse, the ox and 

 the dog respectively. 



Sternal : horse, 8 ; ox, 8 ; dog, 9. 

 Asternal : horse, 10 ; ox, 5 ; dog, 4. 



Define trochanter, condyle, trochlea, foramen, sinus, tuberosity, spinous 

 process, glenoid cavity. 



Trochanter is a large, bony eminence on the superior extremity of 

 the femur, below the neck. 



A condyle is an articular eminence on the extremity of a bone 

 which represents an ovoid segment cut parallel to its larger axis 

 {e.g., the condyles of the femur). 



A trochlea is a pulley-like articular surface on the extremities 

 of bones, as seen on the os astragalus or tibial-tarsal bone. 



A foramen is an opening into or surrounded by bone, through 

 which blood-vessels and nerves pass. 



A sinus is a recess, cavity or hollow space surrounded by bone, 

 found chiefly within the cranium. 



A tuberosity is a large, round, and slightly detached non- 

 articular eminence on a bone (the great tuberosity of the 

 humerus) . 



A spinous process is a bony projection on the dorsal face of a 

 vertebra. 



A glenoid cavity is an oval, shallow, diarthrodial cavity in a bone 

 (the glenoid cavity of the scapula). 



Arthrology 



Name the different classes of articulations and give an example of each 

 class. 



Synarthroses, e.g., the occipitotemporal articulation. 

 Amphiarthroses, e.g., the intervertebral articulations. 

 Diarthroses, e.g., the coxofemoral articulation. 



Define (a) synarthrosis, (b) amphiarthrosis, (c) diarthrosis. 



Synarthrosis is an inunovable articulation as seen in the bones 

 of the skull. 



Amphiarthrosis is a joint with limited movement, being inter- 

 mediate between a synarthrosis and a diarthrosis ; e.g., the sacro-iliac 

 joint. 



Diarthrosis is a freely movable joint, as the atlo-axoid. 



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