Page 136 - The Miracle in the Cell
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THE MIRACLE IN THE CELL








                                                                         TYPE: Simple cubic
                                   TYPE: Cells in the form
                                   of simple scales (squa-               DESCRIPTION: Single-
                                   mous cells)                           layered cubic cells
                                                                         LOCATION: Digestive
                                   DESCRIPTION:
                                   Groups of single-lay-                 pathways, membrane of
                                   ered cells                            the windpipe
                                   LOCATION: Capillary                   FUNCTION: Secretion
                                   walls, air sacs in lungs              and absorption
                                   FUNCTION: Diffusion
                                      EXAMPLES OF SIMPLE EPITHELIAL CELLS


                                            Elastic                              Collagen
                                            fiber                                tissue
                                            Collagen
                                            tissue
                                                                                 Fibroblast
                                            Fibroblast

                                                                         TYPE: Dense and tight-
                                   TYPE: Loose                           ly packed
                                   LOCATION: Beneath
                                   the skin, generally in                LOCATION: Tendons,
                                   the mucosa                            skin and capsule
                                                                         around kidney
                                   FUNCTION: Support
                                   and elasticity                        FUNCTION: Support
                                                                         and elasticity

                                             CONNECTIVE TISSUE CELLS


                                             Width of                            Cells, here
                                             heart cell                          shown
                                                                                 separated
                                                                                 for clarity
                                             Nucleus
                                  TYPE: Skeletal muscle
                                                                        TYPE: Smooth muscle
                                  DESCRIPTION: Long,
                                  straight cells with a single          DESCRIPTION: Long,
                                  nucleus                               thin muscles
                                                                        LOCATION: Hollow
                                  LOCATION: Muscles
                                  attached to the bones                 internal structures such
                                                                        as the stomach
                                  FUNCTION: Facilitate the
                                  ability to move freely
                                    SKELETAL, SMOOTH AND HEART MUSCLE CELLS

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