<span>Stability is often preceded by a "crash" since the growing population eventually is too large for the available resources.
Stability refers to population stability. The growth of the population may destabilize the population stability.
The population size may become so large, so there will be no enough resources for species to survive. </span>
A simple example is a connection between the circulatory and respiratory systems. <span>As </span>blood<span> circulates through your body, it eventually needs fresh oxygen </span><span>from the air. When the </span>blood<span> reaches the lungs, part of the </span>respiratory system<span>, the </span>blood<span> is re-oxygenated.</span>
Http://www.flashcardmachine.com/nutrition-exam33.html
This I think definitely will help :)
When you breathe air in your diaphragm tightens and moves downward. It also increases the space in your chest cavity causing your lungs to expand.The muscles in your ribs also help to enlarge your chest cavity. This causes your rib cage to pull upward and outward when you inhale. When you exhale the exact opposite happens.
You eat the turkey sandwich on wheat bread with mayyonaise using your mouth the salivary gland produce a hormone to help your mouth chew and it breaking down into a pieces to ensure that it would be fit to your esophagus. then when the food enter on your esophagus a narrow long tube connected to your mouth a peristalsis a smooth tissue will help to narrow down the food towarda your stomach and then when the food reach your stomach your stomach undergo a series of reaction first your stomach breaking down the food into a little pieces and mixed it with a strong gastric juice to extract the proteins and the raw materials needed by your body (then it is different discussion for today) your stomach need to process your food up to 6 hrs of digestion after that the food will become a feces this will enter to the small intestine and to the rectum and then to the anus.
