1. Introduction
  1.1 Background
  1.2 Objectives
  1.3 Significance of the Study

2. Comparative Anatomy of Male Reproductive Organs
  2.1 Testes
      2.1.1 Structure and Function
      2.1.2 Spermatogenesis
  2.2 Epididymis
      2.2.1 Structure and Function
      2.2.2 Sperm Maturation
  2.3 Vas Deferens
      2.3.1 Structure and Function
      2.3.2 Sperm Transport
  2.4 Seminal Vesicles
      2.4.1 Structure and Function
      2.4.2 Seminal Fluid Production
  2.5 Prostate Gland
      2.5.1 Structure and Function
      2.5.2 Seminal Fluid Composition
  2.6 Bulbourethral Glands
      2.6.1 Structure and Function
      2.6.2 Pre-Ejaculatory Fluid Production

3. Reproductive Strategies in Different Animal Species
  3.1 Mammals
      3.1.1 Primates
      3.1.2 Canids
      3.1.3 Felines
  3.2 Birds
      3.2.1 Avian Reproductive Anatomy
      3.2.2 Sperm Storage Mechanisms
  3.3 Reptiles
      3.3.1 Reptilian Reproductive Anatomy
      3.3.2 Copulatory Organ Variations
  3.4 Fish
      3.4.1 Fish Reproductive Anatomy
      3.4.2 External vs. Internal Fertilization

4. Evolutionary Adaptations of the Male Reproductive System
  4.1 Sexual Selection
  4.2 Sperm Competition
  4.3 Reproductive Strategies and Mating Systems

5. Conclusion
  5.1 Summary of Findings
  5.2 Implications and Future Research