Human cells also don't have chloroplasts. Maybe the cell membrane is the fence of the cell.

M̸̰̼̳̯͉̻̗̻͚̻̰̀̒̑̈́̐͗̆̾̿͐̏̌͜͝͝i̴̻̦̳͍̮͍̰̭͕͈͕̬̭̪̱̰̜͆̄̎̈́̂̽͆̃͌̿͛̀t̸̨̢̛͓̤̲̤͍̭͈͙͓̰͛̓̓́̀͛̆̃̍̀̈́̔́͋̑͌̅̀̎́͑͆́̿̌̍̆͗̈̐̊͘̕͝õ̸̡̧̨̡̡̳̮͓͎̫̯̝̳̺͖̞̻͓͖̘̹̜̺̜͕̜͈̯̖̰̠͔̱̒̉͗͆̐́̎͋̚͜͜͠͠͠ͅc̷̡̧̛̛̛̣̖̳̜̘̤̘̣̬̪̯̼̘͎̻̩̣̦͕̖͛̆̈́̀̿͗̄̈́̒̃̀͋͋́͗̈́̑̎͆̊̾̎̐̚͘͜͝͝h̷̨̝̳̖̬̩͕̗͓̻͉͚̠̩͎͍̠̩͚̫̝̖̱̤̲̰̲͓̅͋̓̄̋̀̄̋͊̈͑̈́̊͗̏̕͜ǫ̸̯͖̬̖̰̲̤͖̈́̃̐̍̓̉̈́͊̔͑̓́͂̀͐͂͒̽͒̐͆̂͑̑͊̔̎̎̃̾̄̾̄͛̒̽̿͂̇̋́̍͘͠͠͝͝͝ņ̷͙͍͍͎͊̈̊̀̍̇̒̾̓͋̽̇̃́̌̈́̇͌̐̇̇̓͐̓̋͜͠͝͝ḋ̸̢̢̢̧̛͖̟̜̞̰̤̣͈̯͖̪̱̟̻̣͈̮͈͙̞̜͙̬̮̮̮͍̀̃̉̏̌̆̉̒̏̌̅̋̓͂̆́̅̏͛͌̀̈̒̈́̽̒̒͒̏́̅͊̑͌͐͌͋͗̉̈́̓͒̚͜͜͝͝͝͝͠͠ͅŗ̵̡̧̧̢̛͓̬̬̯̣͎̮̫͈̮̟̪̮̯̯̻̮̗̹̤͓̠̼͎̝̲̲͋͒̈́͑͑̓̃̅͆̽̽̈́̽̀̔͗̃͋̉̋̐̋̆̈́̈́̾̃̍͘̕͘͜͠i̸̡̡̪̳͖͈͔̙̮̜͖̼̳̳̭̹̝̙̫͈͇̻̬̞̜̦͉̗̠̩̰̅̀̾̒͒̊̃̏̿̾͠a̴̛̯̥̹͕͇̳̤̫̠̼͇͇̬̎͛͛̅̾̆̓͊́́̀̈͐͒̎͐̋́̈̂͑̍͋̾͌̓̌̓̋͋̓̈́̚̕͜ ̶̢̛̟͖̱̪̝̜̼͉̪͔̬̼̘̰̙̼̠͚͎̇̽̀̀̈́́̆̊̐̅̿͋͒̒̋̂̋̏̔̈́̿̅͑̀̒̍͐̏͑̓̈͐̑̚͜į̷̭̻̝̤͍̬͚̘̝̹̫̤̫͇͈͍̙̬̖͕̳̯̜̱͚̼͕̣̺̭̙̻̩̈̋̊̾̏̈́͛̐̃̒́͂̏̚͠͠͝s̵̡̨̛͍̙͈̰̭̲̰̘̰̮͎̹̯̗̻͔̜͉̹̠̤͙̱̳̤͉̙̙̝͎̟̲͕̦̲͔̀̽͑̐̎̀̂͂̑̄̉̌͊͌͂́̃͊͑́́͐͋̾̔̎̍̀͊̎͊̾̒̈́̌͗̑͑̈́̿̆̋̕̕͘̚̚͠͠ͅ ̵̢̟̖̰̥̝̿̒͆̔̑t̴̡̨̧̢̛̤̠̯̝̝̥̲͎͕̘̭̠̼̬̬̮̞͕̬͈̬͚̯͕̼̝͖͖̤͙͚̩̞̹̦̻̜̦̜̜̏͐̍͊͊́̄͐̀̑͗̅̋̀̀͝͠͝h̶̰͕̮̣̏͋̆̑̍̓͋́͋̈́̈͒́̽̎͐͊͛̓͑̎͊̈̌̍͒̉̉͗͐̅͑̓̉͌͋̓̃̈́̀̾̈́̇̚͠͝ȩ̶̺̙̙̼͖̪̲͎̼̰̬̞̳̝̲̥͇̼͖̫̠̣͙̗̺͚͙͓̞͙̪̠̟̦̤̫̙̮͚̝͎͉͈̼̳̉̽̿̾̿̔̒̿̐̃̅̓̋̽͋͌̏͘͘͝ ̸̡̡̨̢̧̘̘͓̣̺̬̫͓̗͇͓͕̥͇̰͉̻̠̮̮̳̪͙̝̞͓̭̫̜͈̞͈̰̩̼̳̮̳̞̆͗̔̄̎͋̈́̓͛̈́̈́̉̕͘͝ͅͅͅp̶̢̧̳̹̻̖͓̲͔̪̙̩̰̤̙̮̺̤̗̼̦̳̤̹̬̗̬͇̰̠̼̲̞̞͓̘͕̩̼͕̪͚̖̯̰̯̩͎͛͊̀́ͅỏ̶̢̢̦̮̗̺̦̗̼̹̪̟͍̤̙̮͙̺̱̼̫̟͖̘͔̲̺͔̠̓̑̈́̽̏̑̈́̂̎͗̍̂̎̆̍̃̍͆̊͌̈́̑̂̽̊̒̀͒͋̾̂̇̀̈́̈͒͗́͛̇̌̉̔̕͘̕͠͝͝w̷̧̡̲̘̞̰̼̭̹̬̳̮͈̥̼̝̬͓̬̤͖͓͔̳͓̥͚̼̱͎͔̰̬̪̼̞͔̳̼̾̓́̄̀̒̓̓͛́̀͒̇͜͝ͅȩ̵̺̮͉̺̦͚̘͓̜̼̟͓̙͉̣̟͓̝̩͉̦̳͎̲̜̙̪͈̠͕̋̔̀̅́͛͌͐͌̀̆̾͊̆̑͛̃̿̃̑͆̚̕͜͠͝͠͠͝ͅr̸̨̡̧̨̢̛̠̼͖͈̘͓̯̟͓̭̮̜̼̩̗̻̟̥̥̖̗̞̼͎̣̥͕͓̥̙̫̹͎̀́́́̉̃̓͜ͅͅh̵̨̨̢̳̤͈͙̗̜͔͙̭̰̳̜̣͕̮̫̰̞͖̗̫̻͍̭̥͈̰̯̣̳̠͚̬̳̭̟͚̝̜̞̠͙̘͒͜ͅͅͅͅͅõ̸̧̫̲̥̹͚̮̹͍̘̱̥͙̲̃͆͋̈́̀̑͋̈̉̏͗̌̑̊̋̈́̈̈́̉͘̕͜͠͝͠͝ͅự̸̧̝͔̣͔͍̯͈̘̥͍̙̳̋͂̀̒̓̌̋́͗̊͐́̈́̇̈͐̓̇̑̅͆͐̚͘͠͝͝͝͠s̷̡͙͇̗͚͕̹̭̩̱̟̲̯̟͚̺̓͜ͅͅę̸̢̡̨͈̭͇͈̝̳͉̤͈̯̥̭̬̦̙̲̣̬̥̜̖̫͎̦̫͇͖͖͇̋̀͂͆͐͋̒͊͆̇̂̑͋̀̈́̓̊̓͐̒͋̍̄͑̏͒̊͘͜͜͜͝͝ ̴̢̢̛͇̮̬͍̤̫̖̞̲̗̺̫͚̭̲͎̖͈͕̯̯̙͉̰̰̐͛͂̿̉̒̂̽̀̔̆̊͐̇͌̿̓̌͜͝͠ͅo̵̧̨̼̱̲͓͕͙̼̘͙̝͙̭̯̬͉̭͔̗̠̣͉̩͎̘̐͊̐͋͑̂͒̏͂̋̓̚͜͜f̷̨̨̨̡̬̬͎̙͓̫̘͉̳̙̖̯͈̖̙̦̣̘̻̞̲̟͇̯̲͔̱̙̝̦̺̩̠̝͉̟̘̹̺̤͍̘̤̻̊͑̍̌͛̿̈́̂̓̉̈́̓̉̈́̄͗̃̂͐̃̓̓̃̀̽́́̓̈́̒͆̔́̀͂̈́͊̿̽̀̋̒̀̾̕̚͘̚͜͠͠͝ ̸̢̢̛̝̫̟͙̬̖͈̣̳̼̯̟̺̤̫͉̟̟̹͍̜̳͉̼̼̣̯͉͇̟̬̬̤̼̖̾̂̏̌͑̒̍͛̐̉͐̿̃̍̈̋̑͐̔̂̑̍̄͌̈́̃̏̾̉͊͜͜͝͠t̶̡̛̤̣̫̫͉̝̩̪͈͙̘͔̘͕̝̘̠̹̩̗̦͇̊̅̽̓͐́͐̆̈͊͆̋̽̂͋͒̿̂̓̅̓̾̄̈̑͊̀͗̊̒̃̀͒̆̽̃́̆͊͂̉̚̚̕͘͘̕͜͠h̴̯͋̿̀͒̔̽̉̆̓̓̂̃͂͊͊͂̏̋̌̆̽̿̄̓̇̅͊͛͛̆̔̃̌̋͗̓́͑͂̊̚̕̕̕̚͠͠͝͝ẽ̶̡̺̥̱̘̫̦̙̣̖͉̟̤̖̪̗͇̩̦̘͇̻͈̞̳̦̥̔̈̅̇̈̍͒̃̄̏̈͊͌̏͐̐͋̏̇̿͐̀̊͆͒̌̋͑̕̚̚̚͜͝͝͝͝͠ͅ ̵̢̧̡̡̛̫̤̥̞͔̦͙̭͇̮̘̠̙̠̞̘̮̜̻͕͕̺̙͎̣͓̤̖̯͉͉̌̒̀̽́͛͐́̿̾̾͋̃̅̇̈́͋̒͊̕͜͜͜͜͜͠͝͝ͅͅͅc̷̡̡̛̮̩̤̺̬̜͈̝̼͓̮̞̝͇̪͍̠̰̥̜̭̰̰͓͈̹̘͖̯̮̙̮̞̺̝̣̣̭̟͍͒̔̎̽̅̎̽̇̈͗̍̌̇̽͋̊̒͐̓̂̌͂̉͂͊̄̌́͋́͊̑̈́͝ȅ̴͙̦̤̀̆͛͋͆͊̄͘̚͜͠ͅl̴̨̡̛͈̹̞̭̼̼̣̯̻̦̦̻̻̆̃̅̒̃͑̈́̊̃̒̓̌̽̔͒̾̽͑̀͂͗̈́̑̅́̕͘͘͝͠l̷̨̥̝͇͚͍̃̾̾̃͐̆̉̈́͛̏̔̊́̂͂̐̀̃̅̉̓̊͗̓̈́̀͂̿̇̋͑͗͐͂͂̓̽͘̕̕̕̕̕͝͠͝.̵̢̡̻͉̻̯̲̝̤͖͖͚͕̭͍̝̤̭͍̬̞̺̬͙͚̙͖͒̑̓̈͒͌̀͆̋̆̿̅̃̂̾̌̊̊̕͘̕͜͠͠ͅ ̷̧̡̧̧̡̛̛̦̮̪̜̦͎͚̻̦͔̮͙̜̠͎̱͙̬͈̤̘͕̘͔̲̯̗͔͍̹̲̪̱̩̘̯̼̞̗̞̻̺̥̃͐̈̌͋̈́̈́̂̎̎̈́͛͋͐͒̐́̍͗̃̄̈͘̕͜͜͠

of the cell

To add to that, similarly like there are microscopic and macroscopic processes we can only indirectly perveive, there are probably also processes on a much smaller and much larger timescale we can therefore only indirectly perceive.

Like one cell could be the whole universe of some absurdly small conscious beings with a lifespan of less than a femtosecond.