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Animal Reproduction and Development

Animal Reproduction and Development - Animal Reproduction...

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Animal Reproduction and Development Sexual and asexual reproduction common in plants and animals o Asexual reproduction parent produces genetically identical offspring produce many offspring rapidly budding , fission, fragmentation/regeneration o Sexual reproduction: Fusion of gametes from 2 parents: genetic variation Parthenogenesis o An egg develops without sperm Hermaphroditism o Both female and male systems Earthworms External fertilization o Release gametes into environment fertilization Reproduction o Male Testes (gonads) from abdomen inguinal canal scrotal sacs 2 inguinal canals: places where testes descend Sperm is stored in the epididymis Urethra: tube that carries urine Prostate Cancer Detection o Digital rectal exam by physician o Blood tests for prostate-specific antigen (PSA), a tumor marker Within Testes Seminiferous tubules (Sertoli): sperm Interstitial cells (Leydig): hormones Semen = Secretions (+ Sperm)
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Animal Reproduction and Development - Animal Reproduction...

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