Illustrate the tear flow direction of drainage, Biology

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Illustrate the tear flow direction of drainage.

Tear Drainage:

Tear are drained by the combined action of gravity, capillary action and lid movements (Lacrimal pump)

1036_Tear Flow Direction of Drainage.png

Tear Flow Direction of Drainage

The drainage of tear film occurs through the following   lacrimal passages (in sequence:

1. Puncta

2. Canaliculi

3. Lacrimal   sac

4. Nasolacrimal   duct


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