Elements of histology (1898) Elements of histology elementsofhistol00klei Year: 1898 Bone. 8r sliaft of a long bone—tlie concentric lamella? are first absorbed, the Ha- be- way and versian canal ing in this widened out again transformed into a Haversian space. While, then, the bone first de- posited by the peri- osteum is of a spongy character, and gradually be- comes transformed into comi3act_, the reverse is ''oing on at the same time near the marrow cavity, inasmuch as compact bone is here changed into spongy bone, and this ultimately dis- a23pears and be- comes absorbed by the mari'ow. 73
Elements of histology (1898) Elements of histology elementsofhistol00klei Year: 1898 Bone. 8r sliaft of a long bone—tlie concentric lamella? are first absorbed, the Ha- be- way and versian canal ing in this widened out again transformed into a Haversian space. While, then, the bone first de- posited by the peri- osteum is of a spongy character, and gradually be- comes transformed into comi3act_, the reverse is ''oing on at the same time near the marrow cavity, inasmuch as compact bone is here changed into spongy bone, and this ultimately dis- a23pears and be- comes absorbed by the mari'ow. 73. At birth all the primary en- dochondral bone «. has already disap- peared by absorp- tion from the centre of the shaft, and the bone present is all of periosteal origin shaft Fig. 55.—From a Longitudinal Section Femur of Rabbit, through the part in which the intermediate cartiLige joins the end of the shaft. {Atlas.) a, Intermediate cartilage; 6, zone of calcified cartilage ; c, zone in which the calcified tra- heculEB of cartilage become gradiiRlly in- vested in osseous substance, shaded light in the figure; the spaces between the tral>e- cula3 contain marrow, and the cai> blood-vessels are seen here to end in loops ; d, in this zone there is more bone formed; the greater amount the farther away from this zone. At the extremity of the however, tlie spongy bone is all endochondral G
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