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The sucking reflex seems to belong with the rooting reflex. It is present before birth, and also aids in breastfeeding. It causes the child to instinctively begin to suck on anything that touches the roof of their mouth. This reflex is common to mammals, and specifically designed to express milk through the breastfeeding process. There are two stages to the action.
The cough reflex consists of three phases: an inhalation, a forced exhalation against a closed glottis, and a violent release of air from the lungs following opening of the glottis, usually accompanied by a distinctive sound.[1] Coughing is either voluntary or involuntary. Frequent coughing usually indicates the presence of a disease. Many viruses and bacteria benefit, from an evolutionary perspective, by causing the host to cough, which helps to spread the disease to new hosts.