PHIS 206 Lecture Notes - Lecture 33: Male Reproductive System, Female Reproductive System, Reproductive System
2 May 2018
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Lecture 33: Reproduction I
Reproductive System
• Not homeostatic
o Nothing in this system attempts to maintain the body’s current state
• Important for Growth and Development
o Anabolic actions of sex hormones are important in males and females
• Signaling
o Reproductive hormones play a role in regulating body systems
• Behavioral
o Large effects upon interpersonal behavior, as well as identity
Male Reproductive Anatomy
• Variety of accessory organs and glands beyond genitalia
Female Reproductive Anatomy
• Genitalia mostly internal in contrast to male; accessory organs fully in body cavity
Uniqueness of Reproductive System
• Differentiation
o Embryo first develops undifferentiated Male/Female comes later
• Genetics
o Sex cells have half the chromosomes of somatic (body cells)
o Unique in body Second division of meiosis provides wonderful diversity
Sexual Differentiation I
• Genetic Sex
o XX or XY
• Gonadal Sex
o Ovaries or Testes
• Look over the chart
• Male is reason for male or female
Sexual Differentiation II
• Phenotypic Sex
o Male reproductive system or Female reproductive system
• Know the 3 types of sex?
Sexual Differentiation III
• Issues
o Genetic Sex is most reliable (but XO and XXY do occur)
o Gonadal Sex and Phenotypic Sex demand other things to work (hormones,
receptors, and enzymes)
o Gonadal Sex and Phenotypic Sex therefore more prone to more uncommon
outcomes (intersex conditions, hermaphroditism)
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