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B0008353 Dust mite

B0008353 Dust miteCredit: Annie Cavanagh, Wellcome ImagesScanning electron micrograph of a dust mite on a dust particle. Dust mites feed on non-living particulate organic material such as flakes of shed human skin and flourish in the stable environment of houses. Dust mites are a common cause of asthma and allergic symptoms worldwide.

6 day old human embryo implanting - coloured

Credit: Yorgos Nikas. Wellcome Images images@wellcome.ac.uk images.wellcome.ac.uk 6 day old human embryo beginning to implant into the lining of the uterus (endometrium). As implantation progresses, the inner cell mass begins to form into the bilaminar disc. The two layers are called the epiblast and the hypoblast. An embryo that has been in culture for up to 14 days will remain at this stage of development. Such cultured embryos remain alive but do not progress as they would in the womb. Scanning electron micrograph

Human embryonic stem cell

Credit: Annie Cavanagh. Wellcome Images images@wellcome.ac.uk images.wellcome.ac.uk Human embryonic stem cell (gold) growing on a layer of supporting cells (fibroblasts). Stem cells are derived from very early embryos and can either be grown to stay in their original state or triggered to form almost any type of human cell. The fibroblasts provide special factors that maintain the stem cells in their original state. The stem cell appears to be grasped by the underlying fibroblast. Stem cell research could lead to cures for many diseases such as Parkinson's disease, Alzheimer's and diabetes, where a patient's cells are damaged or absent. Scanning electron micrograph

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