TUBULAR SYSTEMS

More particular and systemic
- Opening externally containing either
  - Air
    - Breath pathway
  - Solid food , Liquid or Air
    - Food pathway
  - cells
    - Genital tract
      - female genital tract
      - Male genital tract
  - fluid and cells
    - Excretory pathway
- Opening internally
  - Either Closed containing either liquid
    - Cardiovascular pathway
  - Either opening in to other organs
    - Exocrine glands
  - independent
    - Lymphatic pathway
    - ventricular pathway