EMBRYOLOGY SPERMATOGENESIS 318 OÖGENESIS 319 FERTILIZATION 319 OUTLINE FOR LABORATORY STUDY OF THE CHICK 330 Living Embryo 330 Preparation for Study of Entire Embryos and Sections 330 Points to be Observed in the Study 332 DERIVATIVES OF THE GERM-LAYERS 342 PREPARATION OF STRUCTURES FOR STUDY 343 Directions for Dissecting Muscles 343 Directions for Study of the Viscera 344 Directions for Study of the Arteries 345 Study of the Structure of Bones 346 Special Technic for Dissection of Cranial and Spinal Nerves 347 Directions for Study of Soft Structures 347 To Stain Sections of Liver for Study of Kupffer Cells 349 To Prepare Anatomical Specimens for Museum 349 To Make Specimens Transparent 350 EQUIPMENT FOR THE DISSECTION LABORATORY 351 BIBLIOGRAPHY 353 ─────────────────────────────────────────────────────────────────── INDEX 355 ANATOMY OF THE DOMESTIC FOWL OSTEOLOGY =Osseous Structure.=—Bone is structurally modified connective tissue which has become hard by being impregnated with calcium salts. _Kinds of Bone Tissue._—There are two kinds of bone tissue: substantia compacta, or compact bone tissue; and substantia spongiosa, or spongy, cancellous bone tissue.