HISTOLOGY. 37 



Exercise No. 23. Make a preparation of liver cells 



Do the same as Exercise No. 21. 



P. S. A scalpel is used in scraping. 



Under the head of Epithelial there are several modi- 

 fied cells. Some of them contain mucin and others a 

 pigment. Sometimes their shape takes on the nature 

 of all the four varieties. They are then called transi- 

 tional epithelial cells. Again they are modified accord- 

 ing to function. They are then called specialised epi- 

 thelial cells; i. e., glandular and neuro epithelial. 



