Anatomical terminology
Skeletal system
Joints
Muscles
Heart
Blood vessels
- Blood vessels of systemic circulation
  - Aorta
  - Blood vessels of head and neck
  - Blood vessels of upper limb
  - Blood vessels of thorax
    - Systemic arteries of thorax
    - Systemic veins of thorax
      - Superior vena cava
      - Azygos venous system
        Azygos vein
        Hemiazygos vein
        Accessory hemiazygos vein
  - Blood vessels of abdomen
  - Blood vessels of pelvis and lower limb
Lymphatic system
Nervous system
Respiratory system
Digestive system
Urinary system
Female reproductive system
Male reproductive system
Endocrine glands
Eye
Ear

Hemiazygos vein