Reproductive System Male Anatomy & Physiology Chapter 28.

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Presentation transcript:

Reproductive System Male Anatomy & Physiology Chapter 28

Basic Vocabulary Gametes = sex cells (sperm & eggs), produced by meiosis Gonads = reproductive organs that produce gametes (testes & ovaries) Fertilization = process during which egg and sperm unite Zygote = fertilized egg Gynecology = branch of medicine concerned with treatment of female reproductive system Urology = studies urinary system & disorders of male reproductive system

Egg 1n Haploid nucleus Fertilization Results In A Diploid Zygote Sperm 1n Haploid nucleus

Sperm 1n Fertilization Results In A Diploid Zygote Egg 1n Haploid nucleus Haploid nucleus

Sperm 1n Fertilization Results In A Diploid Zygote Egg 1n Haploid nucleus Haploid nucleus

Sperm 1n Fertilization Results In A Diploid Zygote Egg 1n Haploid nucleus Haploid nucleus

Sperm 1n Fertilization Results In A Diploid Zygote Egg 1n Haploid nucleus Haploid nucleus

From Zygote to Embryo Zygote 2n Zygote 2n

Cleavage From Zygote to Embryo

Cleavage From Zygote to Embryo

Cleavage From Zygote to Embryo

Cleavage From Zygote to Embryo

Morula From Zygote to Embryo

Puberty = process of physical changes by which a child’s body becomes an adult body capable of reproduction Puberty is initiated by production of FSH and LH which cause the development of secondary sexual characteristics Secondary sexual characteristics

I. MALE ANATOMY Scrotum = sac containing the testes; sperm develop in the testes Normal sperm production requires a temperature about 2-3 degrees C below body T Testes develop near kidneys and start descending during the 7 th month of fetal development

Epididymis = site of sperm maturation Vas deferens (or ductus deferens) = duct that transports sperm from the epididymis towards the urethra Urethra = transports both semen & urine Semen = sperm + the fluids secreted by accessory sex glands

Accessory Sex Glands: Seminal vesicles = glands that secrete alkaline fructose rich fluid; used to neutralize acidic environment of male urethra & vagina; fructose is used for ATP production of sperm cells Seminal vesicles make 60% of the volume of semen

Prostate gland = secretes slightly acidic fluid that contributes to sperm motility and viability Prostate gland makes up 25% of the volume of semen Bulbourethral glands (Cowper’s glands) = secrete an alkaline fluid into the urethra that protects the sperm by neutralizing acids from urethra Bulbourethral gland

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