Explain the structure and function of platelets.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Platelets**: Platelets, also known as thrombocytes, are not considered true cells. They are actually cell fragments derived from larger cells in the bone marrow called megakaryocytes.

2. **Presence in Blood**: Platelets are found in the blood, where they play a crucial role in the circulatory system.

3. **Color and Shape**: Platelets are colorless and have an irregular shape. Unlike other blood cells, they do not have a fixed form.

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