Red blood cells are specialised animal cells. Compare the structure of a red blood cell with the structure of a plant cell. – 7005

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1. Nucleus:

   Red blood cells have no nucleus (to carry more oxygen).

   Plant cells have a nucleus that controls cell activities.

   Cell wall:

   Red blood cells do not have a cell wall.

   Plant cells have a rigid cell wall made of cellulose.

   Shape:

   Red blood cells are biconcave discs.

   Plant cells are usually box-shaped or rectangular.

   Pigments:

   Red blood cells contain the red pigment haemoglobin (for oxygen transport).

   Plant cells may contain chlorophyll (for photosynthesis).

   Chloroplasts:

   Red blood cells do not have chloroplasts.

   Plant cells have chloroplasts (if they photosynthesise).

   Vacuole:

   Red blood cells do not have a permanent vacuole.

   Plant cells have a large permanent vacuole that stores water and supports the cell.

   Size:

   Red blood cells are smaller than most plant cells.

   Plant cells are usually larger and more complex.

   Cell membrane and cytoplasm:

   Both have a cell membrane and cytoplasm.

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