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Transcript
Cells Loop An organ system Which part of a cell controls its activities? The nucleus Which part of a cell controls what substances go in and out of the cell? The cell membrane Where do chemical reactions take place in a cell? Hair root cell Which cell has a tail to help it move? Sperm cell Which cell is very long so that messages can be sent right round the body? Nerve cell Which cell has long finger-like projections with thin walls to help it absorb water? A tissue What do we call a group of tissues working together? An organ What do we call a group of organs working together?