Excretory system in Taenia includes

Options

A. Solenocytes/Flame cells
B. Nephridia
C. H-shaped excretory canal
D. Malpighian tubules

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question is about the excretory system in Taenia, which is a type of parasitic flatworm.

2. **Classification**: Taenia belongs to the phylum Platyhelminthes and the class Cestoda. Understanding its classification helps in identifying its biological characteristics.

3. **Excretory System Overview**: The excretory system in Taenia is specialized due to its parasitic nature. It does not have a complex excretory system like higher organisms.

4. **Excretory Structures**: The primary structures involved in the excretory system of Taenia are called **flame cells** or **solenocytes**. These cells are responsible for the excretion of waste products.

5. **Function of Flame Cells**: Flame cells function by filtering waste materials from the body fluids and excreting them through a network of tubules. This is crucial for maintaining osmotic balance and removing metabolic waste.

6. **Comparison with Other Organisms**: Unlike other organisms such as annelids (which have nephridia) or roundworms (which have H-shaped excretory canals), Taenia relies on flame cells for its excretory functions.

7. **Conclusion**: Therefore, the excretory system in Taenia consists primarily of flame cells (solenocytes).