. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. UTERUS—(D the latter is the more considerable, for the body has not yet acquired breadth ; while the cervix, forming a tube of nearly equal calibre with the body, possesses almost twice its length. This greater length of the cervix, as compared with the body of the uterus, is one of the most striking characteristics of fetal life (fig. 441.), one also which continues to be observed for many years after birth. b. The uterus from the time of birth to pu- EVELOPMENT). 643 bcrti/. — From the time of birth until the approach
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. UTERUS—(D the latter is the more considerable, for the body has not yet acquired breadth ; while the cervix, forming a tube of nearly equal calibre with the body, possesses almost twice its length. This greater length of the cervix, as compared with the body of the uterus, is one of the most striking characteristics of fetal life (fig. 441.), one also which continues to be observed for many years after birth. b. The uterus from the time of birth to pu- EVELOPMENT). 643 bcrti/. — From the time of birth until the approach of puberty, the internal generative organs undergo but little change. Gradually, but slowly, increasing in size, they still retain the principal characteristics of the foetal pe- riod. The uterus consists still chiefly of cer- vix, the body being that part which is last developed. Thus in a child of three years (fig. 442.), in whom the entire length of the uterus is 15'", the cervix measures 1 V", and Fig. Uterus and appendages of an infant. a, cavity of the body laid open ; b, of the cervix ; c, anterior lip of the cervix; d, left ovary opened; c, Fallopian tube ; /, right ovary; g, internal os uteri, marking the division between the body and cervix. (Ad Nat.) the body only 4/;/. These dimensions do not materially differ from those of the uterus in the first year of life, nor do they much exceed those of the same organ at birth. But as puberty approaches, the relative proportions of the cervix and body of the uterus are found to have changed, and the latter now preponderates over the former. For while the body now equals the cervix in length, the breadth of the former much exceeds that of the latter. The walls of the upper chamber now become thicker from the more rapid development of the uterine muscular fibre, which is their chief constituent. This not only increases the ex- ternal dimensions of the organ, but, at the same time, causes the parietes to bec
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