What encloses the lungs and attaches them to the inside of the thoracic cavity?Multiple Choicepleuraealveolicartilaginous ringsboneskeletal muscle

The structure that encloses the lungs and attaches them to the inside of the thoracic cavity is known as the pleurae.

Explanation:

1. Pleurae: These are double-layered membranes that surround the lungs. The outer layer is called the parietal pleura, which is attached to the thoracic cavity wall, while the inner layer, the visceral pleura, covers the lungs themselves. The pleural cavity, which is the space between these two layers, contains pleural fluid that reduces friction during breathing.

2. Other Options:

   • Alveoli: These are tiny air sacs in the lungs where gas exchange occurs.
   • Cartilaginous Rings: These are structures that support the trachea and bronchi but do not attach the lungs to the thoracic cavity.
   • Bones: While the rib cage protects the lungs, it does not specifically attach them.
   • Skeletal Muscle: Muscles like the diaphragm assist in breathing but do not provide a covering or attachment.

Final Answer:

The correct answer is pleurae.