Please can some one give me four structures in the thoratic cavity?

Answer 1

Structures within the thoracic cavity include:

the heart,
the great vessels, which include the thoracic aorta, the pulmonary artery and its branches, the superior and inferior vena cava, and the pulmonary veins
other vascular structures such as the azygos vein,
the trachea, bronchi and lungs
the esophagus,
the thymus gland,
structures of the nervous system including the paired vagus nerves, and the paired sympathetic chains,
structures of the lymphatic system, especially the thoracic duct.
It contains three potential spaces lined with mesothelium: the paired pleural cavities and the pericardial cavity. The mediastinum comprises those organs which lie in the centre of the chest between the lungs

Answer 2

Lungs, Heart, Diaphragm, Rib Cage, Sternum, Thoracic Vertebrae, Bronchi, Bronchioles.
Choose as you need.

Answer 3

Heart, lungs, thymus gland, aortic arch. (2 points!)