Fig. 149. — A. Section of the human skin highly magnified. 



1. A hair showing its root and oil gland. 



2. One of the pores of the skin showing the sweat gland at the end. There are millions of 



these in the skin. 



3. The Epidermis or outer skin in which there are no nerves or blood vessels. It is made 



of tiny scale-like cells. 



4. The Malpighian layer of skin on which lies a layer of cells containing colouring matter 



or pigment. In coloured folk this is where the pigment lies. 



5. The nerves of sensation, showing the bulbous end just under the skin. 



6. The Dermis or under skin, which is full of tiny blood vessels and absorbent lymphatic 



vessels. These suck up snake venom when it is injected. 



7. Layer of fatty cells which lie under the Dermis, and which also is full of small blood 



vessels and lymphatics. 



8. Muscle or red flesh which lies beneath the skin, and which also is full of blood vessels and 



lymphatics. 



9. Blood vessels and lymphatics which divide and sub-divide. The latter suck up snake 



venom. 

 B.I. The fang of a snake. 



2. The Epidermis or outer skin. 



3. The under skin or Dermis and layer of fatty cells. This is teeming with tiny blood vessels 



and lymphatic channels. 



4. The muscles or red flesh beneath the skin. 



5. These tiny dots show where the snake venom is usually lodged when a snake drives its 



fangs home. The force with which the venom is discharged causes it to spread in the 

 tissues, hence the reason why it is essential to scarify the site of the punctures freely 

 before rubbing in permanganate of potash. 

 388 



