Bdelloidea are microscopic aquatic animals that are related to roundworms, found in freshwater and moist soil. Interestingly, a male has never been observed within the species; females reproduce exclusively by parthenogenesis (without fertilization).
☤ MD ☞ ☆☆☆ Colored scanning electron micrograph (SEM) of squamous cell carcinoma (cancer) cells from a human mouth. The many blebs (lumps) and microvilli (small projections) on the cells' surfaces are typical of cancer cells.
Grains of pollen come in all shapes and sizes. The large object in the centre of this image is pumpkin pollen; the tiny speck just below and to the right of it is forget-me-not pollen Picture: MICRONAUT / CATERS
Coloured scanning electron micrograph (SEM) of a sperm (blue) attempting to penetrate a human egg (orange). Actually, it takes a great number to weaken the outside of the egg enough for one to fertilize it.
Nerve fibres. Coloured scanning electron micrograph (SEM) of fractured myelinated nerve fibres. The myelin sheath is green, the axoplasm is pink and the endoneurium (connective tissue) is blue. Magnification: x800 when printed at 10 centimetres wide.
Scanning electron Muscle Muscle tissue -microscope (SEM) image of human muscle tissue collected from an 18 year old male during tooth surgery. The connective tissue I collagen fibers and red blood cells . Magnification when printed 10 cm wide.