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Topci12_ANS3319CEmbryogenesis_Notes_Final_2011

Topci12_ANS3319CEmbryogenesis_Notes_Final_2011 - 130 ANS...

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Unformatted text preview: 130 ANS 3319C Reproductive Physiology and Endocrinology Embryogenesis Embryogenesis: Male and Female Reproductive Systems 1) Embryogenesis : formation of the early developing embryo ♦ Differentiation : groups of unspecialized cells develop into functional, recognizable groups of cells with specific functions (dermal layers) • Germ Layers (Table 4-1) Table 4-1. Embryo origin of various organs and systems from the embryonic germ layers Ectoderm Mesoderm Endoderm • Skin, hair, nails, sweat glands, mammary glands • Muscle • Digestive system (including liver & pancreas) • Hypothalamus, pituitary • Blood vessels • Respiratory system • Oral cavity • Reproductive system • Most glands • Nasal cavity Gonads (male & female) • Reproductive tract Uterus, cervix, part of vagina Portions of vagina, vestibule Epididymis, ductus deferens Penis, clitoris • Urinary system • Skeletal system Mesoderm Ectoderm Endoderm 131 ANS 3319C Reproductive Physiology and Endocrinology Embryogenesis 132 ANS 3319C Reproductive Physiology and Endocrinology Embryogenesis 133 ANS 3319C Reproductive Physiology and Endocrinology Embryogenesis 2) Sexual differentiation of reproductive tract ♦ Fertilization: sperm determines gender • Oocyte: X chromosome • Sperm: X (female) or Y (male) • Female XX & Male XY ♦ Primordial germ cell migration (Fig 4-4) • _________________________________________________________ • _________________________________________________________ ♦ ______________________________________________________ • (+) development of primitive sex chords from connective tissue • Medial to embryonic kidneys ♦ Fetal renal system development (concurrent with repro system)...
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Topci12_ANS3319CEmbryogenesis_Notes_Final_2011 - 130 ANS...

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