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End Show 39-3 The Reproductive System Slide 1 of 41 Warm-Up #18 Answer question #1 on study guide page 52 under Chp 39-3 Reproductive System HW. Copyright Pearson Prentice Hall
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39-3 The Reproductive System
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Warm-Up #18
Answer question #1 on study guide page 52 under Chp 39-3 Reproductive System HW.
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39-3 The Reproductive System
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Objectives
1. Describe sexual development
2. Explain the functions of the male and female reproductive systems.
3. Identify the four phases of the menstrual cycle.
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Asexual Reproduction
One parent
Mitosis / Binary Fission / Budding
Diploid cells produced
“identical offspring”
Stable environment
Sessile organisms often
Less energy
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Asexual examples: Hydra
Budding of polypsRegenerationof cut pieces
Video
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Sexual Reproduction
Two parents
Meiosis
Haploid cells (egg & sperm)
Haploid + haploid = diploid (fertilization)
Genetically different offspring
Changing environments
Large Energy input
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Sexual Reproduction
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Flowering Plants Sexual Reproduction
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Gamete Comparison
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Egg1 develops/monthSet # at birth of potential eggs~300 – 400 reach maturityNo “food” reservesSurvive ~24hours after release
Sperm70mil-150mil develop/dayContinual Production throughout life food reserves = seminal fluidSurvive up to ~5 days after release40mil-600mil/ejaculationOnly one fertilizes . . . Why??
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The Male Reproductive System
A sperm cell consists of:
• a head, which contains the nucleus
• a midpiece, which contains energy-releasing mitochondria
• a tail, which propels the cell forward
Head
Nucleus
Midpiece
Mitochondria
Tail
Sperm Facts Video
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Sperm Production (Spermatogenesis)
Process
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Reproduction Hormones
Hormone Produced by Function
Testosterone Testicles Male sex traits
FSH Pituitary Stimulates egg/sperm dvlp
Stimulate estrogen
LH Pituitary Stim. Testosterone
Release of egg, corpus luteum, progesterone
Estrogen Ovaries Female sex traits
Progesterone Corpus luteum Maintains Uterus lining
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Sperm Production Regulation
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The Menstrual Cycle
The Female Reproductive Cycle
Aka the menstrual cycle is controlled by internal feedback mechanisms between the reproductive system and the endocrine system.
The cycle takes an average of 28 days.
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The Menstrual Cycle
Ovulation
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Vas deferens
Pubic bone
Urethra
Penis
Seminal vesicle
Rectum
Prostate gland
Bulbourethral gland (Cowpers)
Scrotum
Testis
Epididymis
The Male Reproductive System
Male Reproductive System
Urinary bladder
Sperm path?
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The Female Reproductive System
Fallopian tube/Oviduct
Ovary
Uterus
Urinary bladder
Pubic bone
Urethra Vagina
Rectum
Cervix
Female Reproductive System
Egg Path?
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SUMMARY
What is the function of the male reproductive system?
What structures does the sperm pass through on its way to the egg?
What is the function of the female reproductive system?
What structures does the egg pass through from ovulation to menstruation?
What are the four phases of the menstrual cycle?
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Complete Study Guide page 54.
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HOMEWORK—DUE MONDAY
1. Read Text 1016-1024
2. Complete Study Guide 57-58
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