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THE INTERNAL TISSUES OF THE FOOT. 



ITS PARTS PARTICULARIZED. 



Having described the component parts of the hoof, or exter 

 nal portion of the foot, we will proceed to the consideration of 

 the internal structures or tissues of that organ. 



The first division of these is into solids and fluids. Of the 

 solid constituents there are bones, cartilages, ligaments, blood- 

 vessels, nerves, absorbents, and secreting glands. 



The Fluid elements comprise the blood, synovia, marrow, 

 lymph, and the various glandular secretions. 



The Bones consist of the pedal, navicular, and the coronal. 



The Cartilages include the articular, the lateral and inferior. 



The Ligamentous Structures comprehend the tendons of 

 muscles that are inserted into the bones named, the lateral and 

 other ligaments of the foot-joint, as well as the synovial, cap- 

 sular, periosteal, and perichondrial membranes, and the fibro- 

 elastic structures of the wall sole and frog. 



The Blood-vessels embrace the arteries, capillaries and veins. 



The Nerves — sentient and motory. 



The Absorbents — superficial and deep-seated. 



The Secreting Textures — of the wall, the sole, the frog, the 

 frog-band, the solar zone, the sebaceous follicles, and the per- 

 spiratory exhalents. 



The fluid elements are sufficiently categorized. 



DESCRIPTION OF THE BONES OF THE FOOT. 



CHEMICAL CONSTITUTION OF BONE. 



Before entering upon the descriptive anatomy of the bones, a 

 brief allusion to the composition and characteristics of bone 

 substance may not be unprofitable, as assisting to throw light 

 on some of the diseases of bone, of which we have several 

 •conspicuous examples in the organ under consideration. 



