According to the Environmental Protection Agency, most fertilizers contain about the same basic materials: nitrogen, potassium, phosphorus and sometimes other nutrients, like zinc, needed for healthy plant growth.

The human body is comprised of trillions of cells. Over 200 types of cells make up the organs, bones, muscles and nervous system. All the cells have similarities, such as a membrane on the outer surface and organelles--structures that perform cellular functions--within the cell.

Bacteria reside in great numbers in many places, both inside and on the surface of the human body. In many cases, like in the gut, the presence of bacteria is beneficial. Bacteria in the mouth causes the formation of cavities, and can increase the chance of other disease and illness.

Salmonella is a common bacterium that causes infection in humans, usually through exposure to inadequately processed foods like chicken or eggs, contaminated water, and contact with animals like reptiles and amphibians. The people affected most are usually very young or have underlying immune deficiencies.

Anaerobic bacteria are organisms that are capable of surviving and growing in an atmosphere of little or no oxygen. Anaerobic bacteria can be further broken down based on their relationship to oxygen: obligate, aerotolerant or facultative anaerobe.

The liver is the primary site in the body for detoxification, and to help ensure that the liver is able to function as this cleansing organ, it's vital to support it through diet. The body continually cleanses itself through a two-stage process, with each stage requiring different nutrients.

Food proteins must be broken down into amino acids that your body uses for tissue growth, maintenance and repair. The enzyme called trypsin, present in pancreatic juice, is essential for efficient protein digestion. Disorders of trypsin production can not only hinder digestive processes, they can damage the pancreas.

An indigestible carbohydrate found in fruits, vegetables, whole grains and beans, fiber adds bulk to stools, speeds the movement of food through the digestive tract and promotes regularly. This can aid in the treatment and prevention of constipation.

Enterococcus faecalis is a strain of bacteria that is known as a commensal organism in the intestines. This means that it is normally found in the intestine, particularly the large intestine, of most human beings.

Weird bodily noises are embarrassing, but they’re also natural and rarely a sign that anything is wrong. Your body is an incredibly efficient machine and, like all working things, it occasionally creaks and gurgles.

The five major organs that secrete digestive juices are the salivary glands, stomach, pancreas, liver and small intestine. Each of these organs synthesizes its mixture of digestive juices that breaks down food into smaller pieces that can be absorbed into the body.

From time to time, everyone sees small dark specks moving in their vision. These "floaters" are actually condensations of vitreous humor -- the gel that fills the inside of the eye. The more movement a person makes, such as during exercise, the more floaters that can be seen moving.