The major organ that you would find in the pleural cavity would be the lungs.
The correct answer is A since i can't see what is under it
Due to the fact that the white blood cells can change their shape and squeeze in through smaller parts of the blood flow, they have the ability to protect the immune system from any infections. They able to move easily in the blood flow, meaning that they can stop any infections or illnesses that would have came the person's way. This is why a person that has more white cells is not ill that often because there are more cells able to reach that particular place of infection.
This is because the cilia cells are in desperate need of energy. They get this source of energy from the mitochondria. Also, goblet cells have ribosomes because they need proteins and catalysts to function