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In Hydra the nervous system is composed of neurons and mechanosensory cells that differentiate from interstitial stem cells (ISCs), which also provide gland cells and germ cells. The adult nervous system is actively maintained through continuous de novo neurogenesis that occurs at two distinct paces, slow in intact animals and fast in regenerating ones. Surprisingly Hydra vulgaris survive the elimination...
This initial chapter introduces those that follow with a summary of the life spans and end of life pathologies of the several species that are included in later chapters. It is not presented as a complete coverage, but rather as background for what follows, as gathered from the literature and personal information. Included here is that information on yeast as Saccharomyces cervisiae, round worms as...
Among the notable trends seen in this year’s highlights in mammalian aging research is an awakening of interest in the assessment of age‐related measures of mouse health in addition to the traditional focus on longevity. One finding of note is that overexpression of telomerase extended life and improved several indices of health in mice that had previously been genetically rendered cancer resistant...
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