. The anatomy and physiology of the human body. Containing the anatomy of the bones, muscles, and joints; and the heart and arteries . ared, it approaches the ovarium,grasps, and receives the ov^um, and by a peristaltic motion,probably very slow and gradual, the ovum is conveyed intothe cavity of the uterus. OF THE OVUM, AND ITS CONNECTIONS WITH THE UTERUS 1-THE EARLY JIONTHS OF PREGNANCY. The ovum, Avhen it has descended into the uterus, and isperfect in its structure, is a soft oval mass, fringed with ves-sels, and composed of membranes containing the early foetus OF THE VvOMB. 34-i When ope
. The anatomy and physiology of the human body. Containing the anatomy of the bones, muscles, and joints; and the heart and arteries . ared, it approaches the ovarium,grasps, and receives the ov^um, and by a peristaltic motion,probably very slow and gradual, the ovum is conveyed intothe cavity of the uterus. OF THE OVUM, AND ITS CONNECTIONS WITH THE UTERUS 1-THE EARLY JIONTHS OF PREGNANCY. The ovum, Avhen it has descended into the uterus, and isperfect in its structure, is a soft oval mass, fringed with ves-sels, and composed of membranes containing the early foetus OF THE VvOMB. 34-i When opened, or dissected, it presents three cavities, or wt*observe the fcetus to be surrounded with three distinct mem-branes. The l.,Decidua, or tunica filamentosa, false chorion,or spongy chorion. 2. The chorion. 3. The amnios. Otthese coats, the outer one is formed by the womb, the othersconstitute the ovum as it has descended from the shall, in the first place, attend to the original membranesand general constitution of the ovum, and then to the decidu-ous covering v*hich it receives in the womb.* Plan of the W:<fg^ c A, The Fcetus. B, The Amnios. C, The Chorion. D, TiicVesicula Alba. Amnion. The amnion is the vesicle which immediately in-volves the fcEtus. Jt is a very thin and pellucid membrane inthe early stage of pregnancy, but it acquires considerablethickness and strength in the latter months. The amnion contains a thin watery fluid in which the suspended. In the abortion of the early months, we find thequantity of this fluid very great in proportion to the wholeovum, and this forms a defence to the delicate and almost ge-latinous substance of the fcetus, while it is a provision also forthe regular presentation of the head of the child, for now thef(£tU3 being suspended in this fluid, and hanging by the umbili-cus, and the head and upper part of the body greatly prepon-derating, it takes that position with the head presenting to * See Al
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Keywords: ., bookcentury1800, bookidanatomyphysiolog, booksubjecthumananatomy
