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Chicken embryo vascular system Vincent Pasque / University of Cambridge This fluorescence micrograph shows the vascular system of a developing chicken embryo (Gallus gallus), two days after fertilisation. Injecting fluorescent dextran revealed the entire vasculature used by the embryo to feed itself from the rich underlying yolk inside the egg. At this stage of development, the embryo and its surrounding vasculature are a little smaller than a 5p coin.

microscopic lungs

Diatom frustule

Virus closeup under microscope

Fat cells, or adipocytes, coloured scanning electron micrograph (SEM). Adipocytes store energy as an insulating layer of fat and the majority of the cell’s volume is taken up by a large lipid droplet. Magnification: x300 when printed at 10 centimetres wide. Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

✯ Intestinal villi. Coloured scanning micrograph (SEM) of villi from the lining of the jejunum (part of the small intestine).✯

Micrograph of 3 hair follicles on a human scalp. ©M. I. Walker / Photo Researchers, Inc.

cell attacked by HIV

Athlete’s foot. Coloured scanning electron micrograph (SEM) of spores (red) of the fungus that causes athlete’s foot (Tinea pedis) on the skin of a human foot (brown). The spores can lie dormant for long periods, until conditions are favourable for germination. Magnification: x3000 when printed 10 centimetres tall. Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Scanning electron micrograph (SEM) of collagen fibers. Collagen is the main protein of connective tissue in animals. Magnification unknown. Credit: DAVID M. PHILLIPS/SCIENCE PHOTO LIBRARY

A scanning electron micrograph (SEM) image of a sweat gland pore (red) opening onto the surface of human skin. Image Credit: Science Photo Library.

Plant in a microscope

Micrograph of blood vessel, artery and vein. More Sharing Services Share on print Share on twitter Share on google_plusone var addthis_config = {'data_track_clickback':true};

A coloured scanning electron micrograph of the head of a tropical caterpillar (order Lepidoptera) Picture: STEVE GSCHMEISSNER / SCIENCE PHOT...

cocktails under the microscope:

Bone tissue

Human embryo at day four | Image Editor Scanning electron micrograph of a human embryo at day 4. The protein coat surrounding the egg (zona pellucida, gold) has been slit to expose the embryonic cells inside (red). These cells go on to form the embryo and can be harvested and cultured to give rise to embryonic stem (ES) cells. Microvilli are visible on the surface of the embryonic cells (blastomeres) and numerous sperm (blue) are still visible on the outside of the zona pellucida.

16-cell human embryo on a pin, SEM, scanning electron microscope picture of the beginning stages of a cell.

Tourmaline & Smoky Quartz

Stalactite.