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)

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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