Bleeding from the Nose Anatomy
To better understand nosebleed, it helps to understand the anatomy of the nose.
The structure of the upper one-third of the nose is bone, while the lower two-thirds are made of cartilage. The nasal septum is a thin layer of bone that separates one side of the nose from the other.
The inside surfaces of the nose are lined by a thin membrane. Many small blood vessels lie beneath the membrane.
Examples of anatomy include:
- Chopra R. Epistaxis: a review. J R Soc Health. 2000 Mar;120(1):31-3. 
- Leong SC, Roe RJ, Karkanevatos A. No frills management of epistaxis. Emerg Med J. 2005 Jul;22(7):470-2. 
- Pollice PA, Yoder MG. Epistaxis: a retrospective review of hospitalized patients. Otolaryngol Head Neck Surg. 1997 Jul;117(1):49-53. 
- Pope LE, Hobbs CG. Epistaxis: an update on current management. Postgrad Med J. 2005 May;81(955):309-14.