edit: I don't understand why my comment is so controversial. We are all subject to the laws of thermodynamics. DNA, proteins, cells, and body structe is basically matter in low entropic state. Its interaction with the environment will inevitably lead damage or erosion of said structures, a basic process of entropy increasing in the system. Nobody is exempt from this process.
I suspect you're being downvoted because you're simply wrong as a matter of physics. Your body isn't a closed system. Entropy is a global variable, it's entirely possible to have subparts of a system (often called things like "engines" or "HVAC systems") experience net decrease in measured entropy just by moving energy around. And your body does that every day. The overwhelming majority of all identifiable entropy transfer in an organism happens as part of "metabolism", not "aging".
That the engine doesn't work forever may very well have a thermodynamic expression, but "because of entropy" is basically missing the point.
Entropy applies to any closed system, and we are far from closed. We take in external energy every single day, and reply on external order with every breath. There is zero reason to think that over the time frame of hundreds to thousands of years that entropy is the limiting factor on human survival.
The question seems poorly worded but I’ll do my best guess here.
As long as you are gaining weight/height, you should be decreasing the entropy of the system around you. Your body’s entropy should be increasing in absolute terms but staying the same/decreasing as a percentage of your overall body.
Growth without order is cancer. It's a form of entropy, not extropy. Extropy is measured as the increasing signal to noise ratio in a system, not how much space it occupies. The systems least prone to entropy are often the most compact. This is also why it's astonishing that elephants defy entropy by not getting cancer at the same rate per cell as smaller mammals.
Most growth in childhood is making order out of chaos and reducing noise, so it's extropic. The point was that continued growth is not always a sign of reduced entropy.
Completely miss the point there. The basic principle behind entropy is that any ordered system will eventually become disordered over time and reaches equilibrium. Some systems go easily disordered within within a human lifetime, or even in seconds. For example, add milk to you coffee and watch it become diffused.
In the context of a human body, the coded information in our DNA, the structured cell walls in our body, are states of matter that is low in entropy. They will eventually get damaged due to interactions with other matter around us. The damage in this case will manifest itself as "aging".
The original comment just says "because of entropy". It's not an explanation, it's an appeal to a black-box technical term. So I pointed out an obvious way in which that term did not apply, since we're rather further than 100 years from the heat death of the universe.
Yes, human bodies by default incur damage and stop functioning within ~100 years. But what prevents that damage from being repaired, other than our ignorance? Are you/they actually claiming it literally violates the laws of physics to repair a human body? Because if not, I reject the appeal to entropy. Entropy is a very specific thing; it is not a generic stand-in for "stuff must break down".
How is GP missing the point? They're arguing about the timescale of entropy, not the basic principle. You're right that ordered systems eventually become disordered, but "eventually" can mean 10^100 years, and you haven't provided any evidence to the contrary.
your body is getting damaged constantly and it is repairing the damage constantly. You are able to do this - in terms of entropy - because you are not a closed system, you are eating food and breathing air. Entropy is not an insurmountable problem for an animal unless it stops eating and breathing, just as entropy is not an insurmountable problem for an electric refrigerator unless it stops receiving power
Entropy is a condition where a system becomes more chaotic over time when energy isn't added to a system. Otherwise life itself wouldn't occur due to entropy, life is precisely possible because energy is added to a system to prevent entropy.
edit: I don't understand why my comment is so controversial. We are all subject to the laws of thermodynamics. DNA, proteins, cells, and body structe is basically matter in low entropic state. Its interaction with the environment will inevitably lead damage or erosion of said structures, a basic process of entropy increasing in the system. Nobody is exempt from this process.