What are the excretory organs of annelids and insects.

Explanation

### Step-by-Step Solution:

1. **Understanding Excretory Organs**: Excretory organs are specialized structures in organisms that help in the removal of waste products from the body. Different organisms have different types of excretory organs based on their physiology and habitat.

2. **Excretory Organs in Annelids**: Annelids, which are segmented worms, have excretory organs called **nephridia**. These organs are found in each segment of the annelid's body. Nephridia function similarly to kidneys in higher animals, filtering waste from the coelomic fluid and excreting it outside the body.

3. **Excretory Organs in Insects**: Insects have a different type of excretory organ known as **Malpighian tubules**. These tubules are blind-ended structures that extend from the digestive tract. They collect waste materials from the hemolymph (insect blood) and transport them to the gut for excretion. The distal end of the Malpighian tubules is closed, allowing for efficient waste removal.

...