Cnidaria (/naÉªËdÉÉriÉ/[4]) is a phylum containing over 10,000[5] species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey.
Exercise Science is a multifaceted field of study in which movement or physical activity is the intellectual focus. This includes exercise of improvement of health and physical fitness and activities of daily living, work, sport, and play.
When we talk about exercise, we nearly always refer to physical exercise. Exercise is the physical exertion of the body-making the body do a physical activity which results in a healthy or healthier level of physical fitness and both physical and mental health. In other words, exercise aims to maintain or enhance our physical fitness and general health.