Human Reproduction 2

Human Reproduction 2 - REPRODUCTION REPRODUCTIVE METHOD E...

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REPRODUCTION
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REPRODUCTIVE METHOD E Sexual - each offspring receives genetic (hereditary) material from two (2) parents a Involves meiosis - provides genetic diversity a Male and female gametes (sex cells) combine their genes in a fertilized egg (zygote). a Offspring usually differ from parents & from each other.
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SEXUAL REPRODUCTION Costly: specialized cells and organs must be formed courtship, and specialized parental behavior use large quantities of energy nurturing developing offspring, either in egg or body, requires resources from mother
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Female Reproductive System FEMALE REPRODUCTIVE SYSTEM
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MALE REPRODUCTIVE SYSTEM
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TESTES Contain seminiferous tubules with: 1. germ cells for sperm production 2. sustentacular (Sertoli) cells for promotion of sperm development 3. blood-testis barrier (tight junctions between sustentacular cells) that separate sperm from the immune system
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Histology of a Testis
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BRAIN-TESTICULAR AXIS Hypothalamus produces GnRH GnRH stimulates anterior pituitary
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Human Reproduction 2 - REPRODUCTION REPRODUCTIVE METHOD E...

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