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Copyright Pearson Prentice Hall

39-3 The Reproductive System

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Asexual examples: Hydra

Budding of polypsRegenerationof cut pieces

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Amoeba asexual division

2nd amoebaNucleus

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Asexual Reproduction:

Runners in strawberries

Spores in Puffball Mushrooms

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Sexual Reproduction

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“Joey” develops in a Pouch

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Flowering Plants Sexual Reproduction

Dry PollenFor sperm

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Ferns Sexual & Asexual Reproduction

Sexual & Asexual

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The Male Reproductive System

Male Reproductive System

Urinary bladder

Vas deferens

Pubic bone

Urethra

Penis

Seminal vesicle

Rectum

Prostate gland

Bulbourethral gland

Scrotum

Testis

Epididymis

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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

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Sperm Production (Spermatogenesis)

Video

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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

See p. 53

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The Female Reproductive System

Fallopian tube

Ovary

Uterus

Urinary bladder

Pubic bone

Urethra Vagina

Rectum

Cervix

Female Reproductive System

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The Menstrual Cycle

The Menstrual Cycle

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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