What are sinusoids ? Where are they found ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Sinusoids**: Sinusoids are specialized blood vessels that have a unique structure. They are characterized by a discontinuous endothelium, which means that the lining of these blood vessels is not continuous. This allows for greater permeability compared to regular capillaries.

2. **Structure of Sinusoids**: The discontinuous endothelium of sinusoids allows for the passage of larger molecules and cells. Additionally, sinusoids often contain phagocytes, which are specialized immune cells that can engulf and destroy foreign particles, such as microbes.

3. **Function of Sinusoids**: The primary function of sinusoids is to facilitate the exchange of substances between the blood and surrounding tissues. The presence of phagocytes in sinusoids helps in the immune response by removing pathogens and debris from the blood.

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