Source of haemorrhage/ bleeding:

1. Extra dural haemorrhage - middle meningeal artery

2. Sub dural haemorrhage - bridging or diploic veins

3. Sub arachnoid haemorrhage - rupture on berry aneursym

4. Tennis bal injury to eye - circulis iridis major

5. Epistaxis -  Sphenopalantine artery

6. During tonsillectomy - para tonsilaar veins, tonsilar and ascending palantine artery

7. Tracheostomy - isthemus and inferior thyroid vein

8. Heamoptysis-bronchial artery

9. Gastric ulcer- left gastric, splenic artery

10. Duodenal ulcer - gastroduodenal artery

11. Hemmorrhoids - submucous rectal venous plexus formed by superior rectal vein & inferior rectal vein

12. Retropubic proastatectomy - dorsal venous plexus

13. Hysterectomy - internal illac artery

14. Menstruation - spiral arteries