372 



APPLIED PHYSIOLOGY 



Muscle cells cut across 



(x 200). 

 a muscle cell. 

 b connective tissue binding the 



cells together. 



The lean part of meat, is muscle. Each muscle can be 



split lengthwise into bundles again and again until each 



muscle cell is separated from the rest. Connective tissue 



binds the whole together. 



A muscle cell is a cordlike body about -^ of an 

 inch in thickness. Extending 

 crosswise upon its surface are 

 alternate dark and light bands 

 which serve to distinguish a 

 muscle cell from all other cells of 

 the body. Each cell is surrounded 

 but not penetrated by a network 

 of capillaries and is held in place 

 by delicate fibers of connective 

 tissue, which are always small in 

 quantity compared with the cells. 

 665. Attachment of muscles. One end of a muscular 



bundle is usually attached to the 



periosteum of a bone, while the 



other end is joined to a string of 



connective tissue called a tendon. 



A tendon is a white pliable cord 



and is exceedingly strong. It 



runs in a groove lined with 



synovial membrane, and its end 



is usually attached to a bone. 



A muscle usually forms a 



rounded projection above a 



joint to be moved, while its 



tendons extend across the joint 



and are attached to the perios- 

 teum of the next lower bone. This arrangement keeps the 



weight of the limbs near their upper extremities. 



a 



A thin slice of a voluntary mus- 

 cle cut lengthwise (X 100). 



a muscle cell. 



b capillaries surrounding the cells. 

 c connective tissue binding 

 cells together. 



the 



