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.
Energy â we all need it, we all use it, and we need a constant supply for physical activity. There are many different definitions of what energy is, but the one most accepted in the exercise science world is, âthe capacity to perform work.â1 The body is a power plant that provides energy for all physical activity, converting chemical energy to mechanical energy and heat. This chemical energy is derived from food (carbohydrates, fats and proteins), stored in the body and ultimately ...