Please help fill in the blanks: The torso, which houses the apparatus consists of upper and lower cavities that are partitioned by the#1.The upper cavity is called the __#2___ (or colloquially the chest) and is almost totally filled with the heart and lungs; the lower the cavity, the abdomen or belly, contains much of the __#3__ and other organs and glands.

The torso, which houses the apparatus consists of upper and lower cavities that are partitioned by the diaphragm.The upper cavity is called the thorax (or colloquially the chest) and is almost totally filled with the heart and lungs; the lower the cavity, the abdomen or belly, contains much of the digestive system and other organs and glands.

Explanation:

The torso is an important part of the body that contains many of our organs, and its integrity is fundamental to our survival.

The torso is divided into two big cavities (thorax and abdomen) by the diaphragm, the most important muscle involved in breathing. The diaphragm has three large openings that allow the passing of the esophagus, and some blood vessels and nerves from the thorax to the abdomen, and vice versa.

Inside the thorax there's the lungs and the heart, which are separated into specific cavities: the pleural cavity, formed by the two layers of a membrane that envelops the lungs called pleura; and the pericardial cavity, formed by the two layers of the pericardium, which surrounds the heart and the large vessels.

The abdomen holds most of the digestive system, like the stomach, the liver, and the intestines, and has other important organs as well such as the kidneys. The organs from the digestive system are held in place by another membrane called the peritoneum.

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