Category Archives: Embryology

Development of genital structures in males and females

Genital structures in males Genital tubercle -Glans penis Urogenital sinusĀ  -Corpus spongiosum,Bulbourethral glands(Cowpers),Prostrate Urogenital folds -Ventral shaft of penis Labioscrotal swelling -Scrotum Gubernaculum -Gubernaculum testis Mesonephric/Wolffian duct -Epididymis,Ejaculatory duct,Ductus deferens Paramesonephric/Mullerian duct -Appendix of testis,prostatic utricle Genital structures in females …

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Derivatives of dorsal and ventral mesogastrium

Derivatives of dorsal and ventral mesogastrium.

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Diaphragm development

Diaphragm develops from the following components: Septum transversum Pleuroperitoneal membranes Ventral and dorsal mesenteries of esophagus Mesoderm of body wall Cervical myotomes Septum transversum forms the central tendon of the diaphragm    

Anatomical structures and their Origin in general

Ectoderm Structures meeting the external environment are ectodermal in origin:Skin Mucous covering of parts of external orifices Oral cavity Anal canal Vagina Urethra Mesoderm Serous lining of body cavities and endothelial lining of CVS,lymphatics and lymphnodes Bone,muscle,cartilage Connective tissue of …

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Genital ridge,wolffian duct,mullerian duct

Development of female genital organs Genital ridge Infundibulopelvic ligament Ovary Ovarian ligament Round ligament Mullerian duct/Paramesonephric duct Fimbria Fallopian tube Uterus Upper 3/4th of vagina Wolffian duct/Mesonephric duct Epoopheron Paroopheron Development of male genital organs Mullerian duct Appendix of testis …

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Development of kidney and reproductive system

Mesonephric duct/Wolffian duct- Males Paramesonephric duct/Mullerian duct-Females Genital ridge-Ovary and testis Pronephros,mesonephros,metanephros. Metanephros gives rise to secretory/excretory part of kidney. Pronephros and mesonephros disappear. If ureteric bud and metanephros doesn’t fuse, agenesis of kidney occurs.


While Ovum is in the Ovary it is in Primary Oocyte stage. Just before ovulation meiosis takes place and Secondary Oocyte is formed and first Polar body expelled. The secondary Oocyte Immediately begins second Meiotic division but is arrested in …

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