Neutrophils contain three types of granules: primary (azurophilic), secondary (specific), and tertiary granules. - Primary granules: These contain enzymes like myeloperoxidase, which are crucial for microbicidal activity. - Secondary granules: These include enzymes like lactoferrin and components like NADPH oxidase, which are involved in the oxidative burst. - Tertiary granules: These contain enzymes that facilitate the migration of neutrophils through tissues.