A fungus, pronounced – FUN-gus, is a small, often microscopic, single-celled or multicellular plant-like organism that does not make chlorophyll. Mushrooms, yeasts, molds, mildews, rusts, smuts, and puffballs are examples. The plural is fungi.

Fungi can be either opportunistic pathogens (such as aspergillosis, candidiasis, and cryptococcosis) that cause infections in immunocompromised persons (including cancer patients, transplant recipients, and persons with AIDS) or pathogens (such as the endemic mycoses, histoplasmosis and coccidioidomycosis, and superficial mycoses) that cause infections in healthy persons.

Fungi are also used for the development of antibiotics, antitoxins, and other drugs used to control various human diseases.

Some fungi are useful in stabilizing sewage or in breaking down wastes for compost.

Chlorophyll
Chlorophyll is a green compound found in leaves and green stems of plants. The intense green color of chlorophyll is due to its strong absorbencies in the red and blue regions of the spectrum, and because of these absorbencies the light it reflects and transmits appears green.

Plants use chlorophyll to convert the energy of sunlight to food in the process known as photosynthesis. In this process the energy absorbed by chlorophyll transforms carbon dioxide and water into carbohydrates and oxygen.

Coccidioidomycosis
Disseminated (scatter or spread widely) coccidioidomycosis (Valley Fever) is a fungal infection caused by the dimorphic (having two forms) fungus Coccidioides immitis that spreads through the bloodstream and involves many organs. In the disseminated form of the disease, the infection may spread to the bones, lungs, liver, brain, skin, heart, and pericardium. Pericardium is the sac around the heart.