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Cannabis leaf surface. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) leaf. The pointed hairs are called lithocyst cells. They contain cystolyths (calcium carbonate crystals). Glandular cells called trichomes are  are of two types: capitate trichomes have stalks, whereas peltate trichomes are rounded and closer to the leaf surface. Trichomes secrete a resin containing tetrahydrocannabinol. The resin is the source of euphoria.

Cannabis leaf surface. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) leaf. The pointed hairs are called lithocyst cells. They contain cystolyths (calcium carbonate crystals). Glandular cells called trichomes are are of two types: capitate trichomes have stalks, whereas peltate trichomes are rounded and closer to the leaf surface. Trichomes secrete a resin containing tetrahydrocannabinol. The resin is the source of euphoria.

Fat tissue. Coloured scanning electron micrograph (SEM) of a sample of fat tissue, showing fat cells (adipocytes, blue) surrounded by fine strands of supportive connective tissue. Adipocytes are among the largest cells in the human body, each cell being 100 to 120 microns in diameter. Almost the entire volume of each fat cell consists of a single lipid (fat or oil) droplet. Adipose tissue forms an insulating layer under the skin, storing energy in the form of fat, which is obtained from…

Fat tissue. Coloured scanning electron micrograph (SEM) of a sample of fat tissue, showing fat cells (adipocytes, blue) surrounded by fine strands of supportive connective tissue. Adipocytes are among the largest cells in the human body, each cell being 100 to 120 microns in diameter. Almost the entire volume of each fat cell consists of a single lipid (fat or oil) droplet. Adipose tissue forms an insulating layer under the skin, storing energy in the form of fat, which is obtained from…

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