Definition
noun
The blood flowing through a circulatory system of an animal, carrying substances from one tissue to another.
Supplement
In humans, there are about 4 quarts of blood that constantly circulates out of the 6 quarts (or more) in the body.
Word origin: blood + stream
Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and development. Certain chemicals though can halt growth, e.g. herbicides in plants, or affect normal physiological activities, e.g. alcohol. For more info, read this tutorial on the effects of chemicals on plants and animals...
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water available for cells to absorb. Take a look at this tutorial to know how the body regulates blood sugar levels and temperature...
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understand how animals adapt to their habitat. For instance, how animals thrive in aquatic habitat and are able to overcome osmosis. It also sheds light on the reasons animals adapt...
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good diet will be one consisting of the right amounts of nutritive compounds. Get to know the different nutritional requirements of the body through this tutorial...
Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function properly. The body does this through feedback control mechanisms, e.g. blood sugar level regulation and temperature regulation. Read this tutorial to know more about the principles of negative feedback control employed by the body to sustain homeostasis...
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory responses performed by homeostatic control systems. Know the different components of homeostatic control systems, homeostatic regulators, and the various biological processes that homeostasis entail...
