THE MUSCLES. 



Fig. 188. Histology of Muscular Tissue. ( ELLENBEEGER. ) 



1. Diagram of part of a striped muscular fiber. S, Sarcolemma. Q, 

 Transverse stripes. F, Fibrillae. K, Muscle nuclei. N, Nerve-fibers entering 

 it with A, its axis cylinder, and Kiihnes motorial end-plate, E, seen in profile. 



2. Transverse section of part of a muscular fiber, showing Cohnheim's 

 areas, C. 



3. Isolated muscular fibrillae. 



4. Part of an insect's muscle, greatly magnified. A, Krause-Amici's line 

 limiting the muscular cases. B, The doubly refractive substance. C, Hensen's 

 disc. D, Singly refractive substance. 



5. Fibers cleaving transversely into discs. 



6. Muscular fiber from the heart of a frog. 



7. Development of a striped muscle from a human foetus at the third 

 month. 



8. 9. Muscular fibers of the heart. C, Capillaries. B, Connective tissue 

 corpuscles. 



10. Smooth muscular fibers. 



11. Transverse section of smooth muscular fibers. 



12. Muscular fibers with tendon. 



13. Interfibrillary muscular nerves. 



