THE MUSCLES. 23 



B. The Gross Structure of a Muscle. 



Material. A piece of lean corned beef about two inches long. 



Some of the parts of a muscle may be seen especially 

 well in a piece of corned beef. 



a. The perimysium, or loose sheath, is on the outside of 

 the entire muscle. 



1. Of what is it composed? 



2. What is its color? 



3. What is its use ? 



4. What relation does it bear to the tendons ? 



5. Where do branch partitions from the perimysium 



extend ? 



b. A muscle is composed of many bundles of tissue or 

 fasciculi. 



c. Smaller fasciculi unite to form a larger fasciculus. 



d. The smaller fasciculi are composed of fibres. Tease 

 out a few fibres. Note their color, size, and shape. 



e. The nerves are the fine white threads seen on the 

 outside and sometimes within the muscles. What is their 

 distribution and use? 



/. The blood-vessels are the red or colorless thin-walled 

 vessels usually found with the nerves. 

 g. Is a muscle a tissue or an organ ? Why ? 

 h. Sketch both longitudinal and transverse views. 



C. The Different Kinds of Muscles. 

 Material. A fowl. 



In a common fowl the different kinds of muscles may 

 be found. The tendons of the muscles of the foot and of 



