The Cell II

After covering the animal cell, I’d like to talk just briefly about a few other types of cells.  We’ll go over plant cells and prokaryote cells.

Plant cells

Plant cells are very similar to animal cells.  Major differences are that plants have a cell wall outside of their cell membrane.  The cell wall provides structure, support, and protection for the cell.  Plant cells also have chloroplasts which are an organelle used to capture sunlight energy and make glucose (food).  The chloroplasts are what give plants their green color; chloroplasts are filled with a green pigment called chlorophyll.  The last major difference is that plant cells tend to have one large, central vacuole (when present in animal cells, they are smaller) which serves to house waste and add structural support.

Prokayote cells

Prokaryotes, organisms without a nucleus (like bacteria), are even more different from plant and animal cells.  They also lack other membrane-bound organelles such as mitochondria and chloroplasts.  Prokaryotes tend to be unicellular, unlike plants and animals.  While they do have DNA, it is in the form of chromosomes you are used to seeing; it tends to be in simple circle or tangled-looking loop shape.

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