Yes, these are considered organs. The skin and the bones both fall under the definition of an organ.
The pupil controls how much light enters the eye
It represents innocence, since the speaker in the poem is sold as a slave.
The answer is natural killer cells.
Natural killer cells are a type of lymphocytes and they are important for the innate immune system. They recognise stressed cells much faster than other immune cells. Their response is rapid and usually only a few days after a viral infection. They also respond to <span>cancer cell </span>formation. While other immune cells can detect only those harmful cells that have specific markers on the surface of the cell membrane, natural killer cells can even detect those cells that miss markers for apoptosis.
