This portion of the ventral body cavity houses the heart and sits in the mediastinum:

The ventral body cavity, which contains the thoracic cavity, contains most of the body's organs. The thoracic cavity is further divided into left and right pleural cavities which hold the lungs, and the mediastinum, which houses the heart within its own pericardial cavity

Explanation:

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides