2. http://nz.youtube.com/watch?v=oYS90knzRl8
3. http://nz.youtube.com/watch?v=O21VnOgICa8
Phagocytosis is the cellular process of engulfing solid particles by the cell membrane... in the immune system it is a major mechanism used to remove pathogens and cell debris.
2. http://nz.youtube.com/watch?v=Ql7i_TLUurM
3. http://nz.youtube.com/watch?v=b0vkSFs5RvM
4. http://nz.youtube.com/watch?v=fzbtsJz2Ofc
Chemotaxis is the phenomenon in which bodily cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment.
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