Anatomy and Cell Biology 3309 Lecture Notes - Lecture 19: Egg Cell, Metaplasia, Microvillus
29 Mar 2017
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Oocyte is released into the body cavity before it"s swept up by fimbriae into the fallopian tube (oviduct) Fimbriae: epithelial folds (contains sm fibres: can have a case where fimbriae doesn"t sweep up oocyte, result in ectopic pregnancy. Intramural segment: narrow segment where lumen touches wall of uterus. Ensures that oocyte is always in contact with epithelium. Simple columnar epithelium: ciliated cells, non-ciliated cells (peg cells) Ciliated cells: transport fluid made by non-ciliated cells towards uterus: oocyte"s main way of transport. Non-ciliated cells: produce nutrient-rich fluid after ovulation (prepare for implantation: nourishes oocyte, has microvilli! Cervix: narrow part of uterus: protrudes into vagina. Endometrial epithelial glands change size and shape during menstrual cycle. Arcuate artery: sends radial branches into endometrium. Radial branch: straight & spiral artery: straight branch only supply stratum basale, spiral branch supply stratum functionale. Venous lacunae forms (pockets where blood can pool & venous return)
