We start as a zygote in our mother's womb.The zygote splices into two,two into four,four into eight,on and on till one becomes the baby and arrives in birth to the outer world.Does the splicing continue even after birth creating the growth of the body?Can we oldies continue the cell splicing with exercise and yoga.Then for how long? YM Sarma
*Mar*In humans, cell division (mitosis) indeed continues after birth, as it is crucial for growth, repair, and maintenance of tissues. Here’s how this process unfolds across different life stages: 1. **Infancy and Childhood**: The first few years of life involve rapid growth. Most tissues and organs continue to grow by producing new cells through cell division, with growth hormones driving this process. During this phase, the cells undergo high rates of mitosis, contributing to increases in body size, height, and organ development. 2. **Adolescence**: The body undergoes another surge in growth during puberty. This is when hormonal changes significantly increase cell division rates in bones, muscles, and other tissues, leading to rapid growth in height and secondary sexual characteristics. Growth typically slows by the end of adolescence. 3. **Adulthood**: By early adulthood, most growth in height and body size ceases as the growth plates in bones close. However, cell division continues, though primarily for maintenance and repair rather than growth. For example, skin cells, red blood cells, and cells in the gut lining continuously renew throughout adulthood. 4. **Late Adulthood**: Although cell division continues lifelong, it decreases in rate and efficiency as we age. This decline contributes to slower healing and a gradual loss of muscle and tissue mass with advanced age. Some cells, such as neurons and muscle cells, rarely divide after a certain stage, relying instead on maintenance rather than regeneration. The process of **cell division continues throughout life** in most tissues, though its purpose shifts from growth to maintenance and repair by adulthood. In most individuals, growth in height typically halts in the late teens, though overall cellular maintenance persists until advanced age. Yes, in older adults, exercise and yoga can stimulate cell division and growth in certain types of cells, especially in muscle tissues, which can help maintain or even increase body mass to some extent. Here’s how these practices contribute: 1. **Muscle Hypertrophy**: Resistance training (e.g., weightlifting or bodyweight exercises) can stimulate muscle cell growth and increase muscle mass. While muscle cells don’t typically divide, they do undergo **hypertrophy** (increasing in size) in response to exercise, primarily due to increased protein synthesis and cellular adaptations within the muscle fibers. 2. **Stem Cell Activation**: Exercise, especially weight-bearing and resistance activities, activates satellite cells—muscle stem cells responsible for repairing and growing muscle fibers. These cells are limited in number but remain responsive even with age, allowing older adults to rebuild and grow muscle tissue to a degree. 3. **Bone Density and Growth**: Weight-bearing activities promote bone growth by stimulating bone-forming cells (osteoblasts), helping maintain or increase bone density, which can counteract age-related bone loss. 4. **Yoga and Cellular Maintenance**: Yoga and stretching exercises improve blood flow, oxygenation, and flexibility, promoting cellular health and slowing degeneration in muscle and connective tissues. Yoga also reduces oxidative stress, which can support cellular health by reducing damage to DNA and other cell structures. 5. **Hormonal Benefits**: Both resistance exercise and yoga influence the production of growth hormone and testosterone (even in small amounts in older adults), which are associated with muscle repair, cellular renewal, and tissue growth. While it’s challenging to induce growth comparable to that seen in youth, consistent exercise and yoga can help sustain and enhance cellular health, contributing to strength, stability, and, in some cases, moderate increases in muscle mass. -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/thatha_patty/CACDCHC%2BXsQ64LpiQ2RRPQtAdP__O1LpCZZn38HE7_pCETab4yA%40mail.gmail.com.
