Mark the false statement w.r.t. cockroach

Options

A. Excretion is performed by Malpighian tubules which occur at the junction of midgut and hindgut
B. Cockroach is uricotelic
C. Blood vascular system of cockroach is closed type
D. Respiratory system consists of a network of trachea, that open through 10 pairs of spiracles

Explanation

To solve the question regarding the false statement with respect to cockroaches, we will analyze each statement provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Statement 1: Excretion is performed by Malpighian tubules.**
- **Analysis:** This statement is true. In cockroaches, excretion is carried out by Malpighian tubules, which are located at the junction of the midgut and hindgut. These tubules help in the removal of waste products from the hemolymph (blood) and contribute to osmoregulation.

2. **Statement 2: The cockroach is uricotelic.**
- **Analysis:** This statement is also true. Cockroaches are classified as uricotelic organisms, meaning they excrete nitrogenous waste primarily in the form of uric acid, which is less toxic and conserves water.

3. **Statement 3: The blood vascular system in the case of the cockroach is closed type.**
- **Analysis:** This statement is false. Cockroaches have an open circulatory system, where the blood (hemolymph) is not confined to blood vessels but instead bathes the organs directly in a cavity called the hemocoel. This is a key characteristic of arthropods.

4. **Statement 4: The respiratory system consists of a network of trachea.**
- **Analysis:** This statement is true. Cockroaches have a well-developed respiratory system that consists of a network of tracheae, which are air-filled tubes that open to the outside through spiracles. This system allows for efficient gas exchange.

### Conclusion:
The false statement regarding cockroaches is: **"The blood vascular system in the case of the cockroach is closed type."**

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