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CELLS OF THE VERTEBRATE BODY 



Fig. 79. — Sustentative tissues. A. Cells of mucous connective tissue which 

 occurs in the umbilical cords of mammals. The gelatinous intercellular 

 material is not represented. B. Mesenchyme cells. C. Reticular connec- 

 tive tissue from the spleen. D. Fibrous connective tissue from the sub- 

 mucosa showing both white and elastic fibers. E. Elastic fillers of fibrous con- 

 nective tissue from the nuchal ligament of the ox. F. Adipose tissue showing 

 various stages of storage of fat drops in the cells. G. Hyaline cartilage from 

 the end of a rib. //. Elastic cartilage from the external ear. /. Fibrous 

 cartilage from an intervertebral disc. /. Bone cell lying in a lacuna. 

 K. Bone lacuna; and canaliculi from dried bone. L. Haversian system in 

 which lacunae are arranged concentrically around a central or Haversian canal. 

 Canaliculi connect lacunae and canal. 



cc, cartilage cell; cl, lacuna in which cartilage cell lies; ef, elastic fiber; fd, fat drop; 

 he, capsule of hyaline cartilage, surrounding cells of elastic and fibrous cartilage; wf, white 

 fiber. (.4, E, H, K, and L from drawings by D. F. Robertson.) 



