Photo Researchers ftp March 2011

SEM of Vibrio cholerae, an acute bacterial infection of the small intestine, characterized by severe diarrhea and vomiting, muscular cramps, dehydrati...

Human fetus.

Human embryo.

Light micrograph of archegonium of a prothallium (fern in the gametophyte stage). Magnification x100 @ 35mm.

Light micrograph of young sporophytes of the prothallus of a fern. Magnification x20 @ 35mm.

Light micrograph of fern sporophytes at magnification x4 @ 35mm.

Light micrograph of a fern (Selaginella) sporeling. Magnification x20 @ 35mm.

Light micrograph of a mature sporophyte of a marchantia, or liverwort. Magnification x40 @ 35mm

Bladder stones from a dog. 1 oz, 1.5" stone at right, 2 oz, 2" stone ate left with tiny stones in the foreground.

X-ray subtraction angiography of carotid arteries.

X-ray subtraction angiography of carotid arteries.

Filamentous form of Lee (Type B) Influenza Virus magnified x47,000.

Filamentous form of Lee (Type B) Influenza Virus magnified x47,000.

Transmission electron micrograph of what happens to a group of living cells when invaded by the measles virus. The cells have clumped together into on...

Transmission electron micrograph of what happens to a group of living cells when invaded by the measles virus. The cells have clumped together into on...

Transmission electron micrograph of what happens to a group of living cells when invaded by the measles virus. The cells have clumped together into on...

Color enhanced TEM (transmission electron micrograph) of intercellular crystals in the liver. They are not free in the cytoplasmic matrix but are inva...

Color enhanced TEM (transmission electron micrograph) of intercellular crystals in the liver. They are not free in the cytoplasmic matrix but are inva...

Color enhanced TEM (transmission electron micrograph) of intercellular crystals in the liver. They are not free in the cytoplasmic matrix but are inva...

Color enhanced TEM (transmission electron micrograph) of a portion of the cytoplasm of a liver cell. Liver cells contain branching and anastomosing tu...

Color enhanced TEM (transmission electron micrograph) of a portion of the cytoplasm of a liver cell. Liver cells contain branching and anastomosing tu...

Color enhanced TEM (transmission electron micrograph) of a portion of the cytoplasm of a liver cell. Liver cells contain branching and anastomosing tu...

Color enhanced TEM (transmission electron micrograph) of an area of cytoplasm from a hamster liver cell containing peroxisomes. Peroxisomes are abunda...

Color enhanced TEM (transmission electron micrograph) of an area of cytoplasm from a hamster liver cell containing peroxisomes. Peroxisomes are abunda...

Color enhanced TEM (transmission electron micrograph) of an area of cytoplasm from a hamster liver cell containing peroxisomes. Peroxisomes are abunda...

Color enhanced normal electrocardiogram (EKG) readout during a stress test.

Color enhanced normal electrocardiogram (EKG) readout during a stress test.

Color enhanced normal electrocardiogram (EKG) readout during a stress test.

Color enhanced normal electrocardiogram (EKG) readout during a stress test.

Color enhanced normal electrocardiogram (EKG) readout during a stress test.

Color enhanced, negatively stained herpes Simplex Virus (HSV) particles shown with an intact envelope. Herpes viruses produce vesicular eruptions comm...

Color enhanced, negatively stained herpes Simplex Virus (HSV) particles shown with an intact envelope. Herpes viruses produce vesicular eruptions comm...

Color enhanced, negatively stained herpes Simplex Virus (HSV) particles shown with an intact envelope. Herpes viruses produce vesicular eruptions comm...

Color enhanced transmission electron micrograph of the herpes simplex virus.

Color enhanced transmission electron micrograph of the herpes simplex virus.

Color enhanced transmission electron micrograph of the herpes simplex virus.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph of the herpes simplex virus negatively stained with phosphotungstic acid.

Color enhanced transmission electron micrograph (TEM) of the ultrastructural details of a number of influenza virus particles, or virions. A member of...

Color enhanced transmission electron micrograph (TEM) of the ultrastructural details of a number of influenza virus particles, or virions. A member of...

Color enhanced transmission electron micrograph (TEM) of the ultrastructural details of a number of influenza virus particles, or virions. A member of...

Color enhanced transmission electron micrograph of the influenza virus, at 40,000x.

Color enhanced transmission electron micrograph of the influenza virus, at 40,000x.

Color enhanced transmission electron micrograph of the influenza virus, at 40,000x.

Color enhanced micrograph of purified hepatitis virus particles from a human liver.

Color enhanced micrograph of purified hepatitis virus particles from a human liver.