How do certain cells in the human body keep their structure for so long on a molecular level if they seldom replicate?

Question

Thinking about heart and nueron cells which sources seem to indicate that if they even replicate, they do so at a very slow process.

Assuming that this is the case, how can such cells not breakdown on a molecular level when even the mos sturdiest of nonbiological materials do not stand up to the test of time without loosing it’s structural integrity?

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In: 3

Answer 1

Unlike nonbiological materials, living things can heal and grow. When you eat food, nutrients get absorbed through your intestines and go into your blood. Your blood flows around your body, and as it passes by cells, it gives them nutrients which they use to build replacement parts or repair themselves.