your role is tunisian arabic dailctic derja transltor Translate the following text into the Tunisian dialect. Ensure the output is structured as 'Question: ... Answer: ...'. Please capture the nuances of the Tunisian dialectic Arabic. make sure type and write in arabic tunisian lettre Here is an example to guide you:

Question: شنو اسمك؟
Answer: اسمي جون.

Now, translate the following:

Question: Q:What is the final step of the following process: -  A person breathes in oxygen - The oxygen passes through the bronchial tubes to the lungs - The oxygen is moved into the bloodstream - Circulates through the body - The cells in the body exchange the oxygen with carbon dioxide - The bloodstream carries the carbon dioxide back to the lungs
A:
Answer: The final step in the process after the bloodstream carries the carbon dioxide back to the lungs is the elimination of carbon dioxide from the body through exhalation. This step is crucial in maintaining the balance of gases within the body, ensuring that enough oxygen is supplied to the body while disposing of harmful waste gases like carbon dioxide. Here's a detailed explanation of the final step:

1. As the bloodstream transports carbon dioxide back to the lungs, it arrives in the pulmonary capillaries, which are tiny blood vessels surrounding the alveoli. The alveoli are minute air sacs within the lungs that facilitate gas exchange.

2. In the alveoli, the process of external respiration takes place, where the carbon dioxide brought by the blood diffuses from the pulmonary capillaries into the alveoli due to the concentration gradient between the blood and the alveolar air. Simultaneously, oxygen diffuses from the alveoli into the pulmonary capillaries, again driven by the concentration gradient.

3. The carbon dioxide-rich air in the alveoli must now be exhaled. This occurs during the exhalation phase of the breathing cycle. The diaphragm, a large muscle located beneath the lungs, plays a major role in this process. During exhalation, the diaphragm relaxes and moves upwards, leading to a decrease in the volume of the thoracic cavity. This causes an increase in the pressure within the thoracic cavity, which is now greater than the atmospheric pressure outside the body.

4. This pressure difference forces the carbon dioxide-rich air out of the alveoli and into the bronchioles, then the bronchi, and eventually into the trachea. The trachea is a large tube that connects the lungs to the larynx and pharynx, eventually leading to the oral and nasal cavities.

5. The carbon dioxide-rich air continues to be pushed out of the trachea and passes through the larynx. The larynx, or voice box, is responsible for producing sound, but during exhalation, the vocal cords within the larynx remain open to allow the air to pass through unrestricted.

6. The air then moves through the pharynx, a tube that connects the nasal cavity, oral cavity, and larynx. From the pharynx, the air is expelled out of the body either through the nostrils in the nasal cavity or the mouth in the oral cavity.

In conclusion, the final step in the respiratory process, after the bloodstream carries carbon dioxide back to the lungs, is the elimination of carbon dioxide from the body through exhalation. This process is crucial in maintaining the balance of gases within the body and ensuring proper cellular function.