27A: Reproductive System of the Human Male (27.3)
Connection: What Might Obstruct the Male Urethra? (27.3)
27B: Reproductive System of the Human Female (27.5)
Key Concepts Quiz
Hydra Releasing Sperm (27.9)
27C: Sea Urchin Development Video (27.11)
Sea Urchin Embryonic Development (27.11)
27D: Frog Development Video (27.12)
Frog Embryo Development (27.12)
What Determines Cell Differentiation in the Sea Urchin? (27.14)
Key Concepts Quiz