What happens to the volume of air in your lungs when you ascend surface ocean?

The volume of air in your lungs increases when you ascend from the surface ocean. This is because the pressure of the water decreases as you move upwards, which causes the air in your lungs to expand.

To understand this, imagine that you have a balloon filled with air. If you place the balloon underwater, the pressure of the water will compress the balloon and reduce its volume. This is because the water exerts a force on the balloon from all sides.

Now, imagine that you start to move the balloon upwards towards the surface of the water. As you do this, the pressure of the water will decrease, which will cause the balloon to expand. This is because there is less force acting on the balloon from the water.

The same thing happens to the air in your lungs when you ascend from the surface ocean. The pressure of the water decreases as you move upwards, which causes the air in your lungs to expand. This expansion of air can cause your lungs to feel full and may even make it difficult to breathe.

It is important to ascend from the surface ocean slowly to give your lungs time to adjust to the decreasing pressure. If you ascend too quickly, the air in your lungs may expand too rapidly, which can cause a condition called pulmonary barotrauma. This condition can damage the lungs and may even be fatal.