Define
Bilateral
Hypoventilation
Hemothorax
Arrhythmias

Explanation:

Bilateral symmetry is a type of body symmetry where the body is divided in to halves i.e refers to organisms that have body shapes which look like mirror images along the midline which is called the sagittal plane.

Hypoventilation is a process where little amount of air enter into the alveoli which result in a decrease in the amount of oxygen in the lungs and increase in carbondioxide produced by the lungs. It is caused by too shallow breathing or slow breathing.

Hemothorax is a condition where there is blood build up in the pleural space or chest wall and lungs.

Arrhythmias is a health condition where there is irregular heartbeat. That is the heart may beat to fast, too slow, or irregular heart rhythm.

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biology is the study of life. it is the study of living organism.