Gonads - PowerPoint PPT Presentation

Major Endocrine Glands – Abdominopelvic - 3

Major Endocrine Glands – Abdominopelvic - 3. Endocrine Glands. Gonads. The testes contain two types of cells that secrete hormones: Interstitial cells Sustentacular cells. Interstitial Cells. Make androgens: The main androgen is testosterne .

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Lecture 5 Animal Evolution – The Invertebrates

Lecture 5 Animal Evolution – The Invertebrates. Their Life Cycle. Medusae &amp; polyps-grow &amp; develop during their lifecycles. Medusae; sexual stage Embedded in the medusa’s epithelium are gonads; primary reproductive organs. Gonads release gametes; sperm &amp; ovum-zygote.

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108 views • 2 slides

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