24 PHYSIOLOGY FOR THE LABORATORY. 



the leg of a fowl should be dissected carefully, leaving 

 their attachments at both ends. By pulling the upper 

 ends of the tendons that are attached to the muscles of 

 the fore leg, the toes will move as in a living fowl, and 

 can be made to .pick up objects. 



Find as many as possible of the following kinds of 

 muscles. 



a. A simple muscle is enlarged in the middle and tapers 

 towards either end. 



b. A biceps muscle is divided into two parts at one end 

 so that it has three tendons. Find the biceps in the leg 

 of the fowl. 



c. In a penniform muscle the tendon runs along the side 

 of the muscle. 



d. The tendon runs down the middle of the muscle in 

 the bipenniform muscle. This kind may be found on the 

 breast of the fowl. 



e. Sketch one of each kind. 



D. The Microscopical Structure of Muscles. 

 I. STRIATED MUSCLE. 



Material. A prepared slide of striated muscle. 

 Apparatus. A compound microscope. 



Study under the compound microscope a prepared slide 

 of a few fibres of striated muscle that have been teased 

 apart. Frog's muscle shows the stria tions very plainly. 



Notice : 



a. A single fibre. 



1. Its shape. 



2. The striations that run across the cell. 



