BIO220H1 Lecture Notes - Decidua, Umbilical Artery, Umbilical Vein
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BIO220H1 Full Course Notes
Verified Note
38 documents
Document Summary
2 real life scenarios: pregnancy and birth together with exercises. Reproductive system highly regulated by hormones egg or ovum once ovulated 72hours life. Egg release to ovary to fallopian tube through chemotaxis. Fertilization day 1 egg still in fallopian tube after fertilization zygote form as it travel cleavage occurs continuously large spherical mass morla. Blastocysts pass to 5-9 days after fertilization. Changes in lining of lining of uterus during reproductive cycle- endometrium goes to repeated changes. During follicular phase endometrium proliferates and thickens and there is devpt of endometrial glands secrete clear fluid in uterus implantation now must occure. Blastocyst attaches to lining of uterus have rich capilliary network. T rophoblasts cells surround the blastocysts and this is the first point of contact bet. endometrial cells and the lining. have many processes similar to cancer cells. Endometrium produces prostaglandins ac causes edema w/c further facilitates invasion process. Human and non human primate plantation is complete.
