Most laxatives (except saline laxatives) may be used to provide relief: 1  during pregnancy. 2  for a few days after giving birth. 3  during preparation for examination or surgery.  for constipation of bedfast 1  patients. for constipation caused by other medicines.  following surgery when straining should be avoided.
Grasslands of BC :: Ecosystems. Energy Flow. Refer to the yellow arrows in the diagram to help you understand the way that energy moves through an ecosystem. Energy enters an ecosystem in the form of heat from the sun. This energy is absorbed by organisms such as plants, and is then converted to other forms of energy and stored. Once stored, energy is used for necessary life functions, such as growth, movement and reproduction.
The flow of energy from the sun through an ecosystem can be illustrated in a food chain, such as this generalized one: Generalized food chain. Energy is lost in the form of heat at each level of a food chain, which means that the number of individuals at each successive level decreases. For example, within a food chain there are always more producers than primary consumers, and more primary consumers than secondary consumers or tertiary consumers.