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Why are there lysosomes in tears?

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Tears produced from lacrimal glands present in the bony covering of ethmoid bone of the skull, contains mostly water, salts and lysozyme. Tears are mainly produced and secreted to keep the outer parts of the eye hydrated and free from pathogenic infections. read more

Tears produced from lacrimal glands present in the bony covering of ethmoid bone of the skull, contains mostly water, salts and lysozyme. Tears are mainly produced and secreted to keep the outer parts of the eye hydrated and free from pathogenic infections. Lyzozyme produced from lysosomes present in tears are actually bactericidal in nature. read more

Lysozyme is a family of enzymes (EC 3.2.1.17) which damage bacterial cell walls by catalyzing hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins. It is abundant in a number of secretions, such as tears, saliva, and mucus. read more

There have been increasing reports of plant vacuoles that contain the enzymes found in animal lysosomes, so effectively 'plant lysosomes' being found. Nevertheless, many textbooks describe lysosomes only in the context of animal cells, e.g. human epithelial cells, and do not explicitly state whether or not lysosomes are also present in plant cells. read more

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