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    SEM image of blood clot

    Giardia smiles back at you. Duodenum has C-shaped/cup-shaped organisms because cut on its side.

    Cancer cell division. Each little bump is a small part of the cell trying to divide again...this is why cancer is "uncontrolled growth"

    E. coli--part of the normal flora of the human gut. Certain strains of E. coli produce various toxins that cause illness

    HeLa cell dying, colored SEM. This cell appears spherical because it is undergoing apoptosis, or programmed cell death. Apoptosis occurs when a cell becomes old or damaged.

    Neisseria meningitidis is a Gram-negative diplococcus that is one of the most common causes of bacterial meningitis. Meningitis is an inflammation of the meninges that protect the brain and spinal cord that can be caused by bacteria and viruses. N. meningitidis is a significant cause of morbidity and mortality worldwide.

    Primordial Quasar

    Image of Streptococcus, a type (genus) of spherical bacteria that can colonize the throat and back of the mouth. Stroptococci often occur in pairs or in chains, as shown here. Tina Carvalho, University of Hawaii at Manoa

    Developing nerve cells...

    A diatom chain by Charles Krebbs

    This is your brain on dopamine. Dopamine Neurons. (Source: CELLIMAGELIBRARY.ORG)

    Unwelcome Valentine: Electron micrograph of the disease-causing protozoan Giardia lamblia partway through cell division, forming a heart shape. Public Health Image Library, Dr. Stan Erlandsen

    Human Nerve Cell

    Mosquito Antenna

    Streptococcus Bacteria.

    HIV virus particles are attacking a CD4+ T-cell

    Trypanosoma brucei (African sleeping sickness)

    Giardia lamblia...smiling all the way down your GI tract

    Giardia lamblia is a flagellated protozoan parasite that colonizes and reproduces in the small intestine, causing giardiasis. The parasite attaches to the epithelium by a ventral adhesive disc. Giardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastrointestinal tract, but remains confined to the lumen of the small intestine.Giardia trophozoites absorb their nutrients from the lumen of the small intestine, and are anaerobes.

    All sorts of little things in the water