tailieunhanh - Lecture Biology: Concepts and connections (Sixth edition) – Chapter 4

Chapter 4 - A tour of the cell. The main contents of this chapter include all of the following: Introduction to the cell, the nucleus and ribosomes, the endomembrane system, energy-converting organelles, the cytoskeleton and cell surfaces. | Chapter 4 A Tour of the Cell PowerPoint Lectures for Biology: Concepts & Connections, Sixth Edition Campbell, Reece, Taylor, Simon, and Dickey Lecture by Richard L. Myers Copyright © 2009 Pearson Education, Inc. Introduction: Cells on the Move Cells, the simplest collection of matter that can live, were first observed by Robert Hooke in 1665 Antoni van Leeuwenhoek later described cells that could move – He viewed bacteria with his own hand-crafted microscopes Copyright © 2009 Pearson Education, Inc. Introduction: Cells on the Move Although cell movement attracted the early scientists, we know today that not all cells move – However, the cellular parts are actively moving – Cells are dynamic, moving, living systems Copyright © 2009 Pearson Education, Inc. Introduction: Cells on the Move The early microscopes provided data to establish the cell theory – That is, all living things are composed of cells and that all cells come from other cells Copyright © 2009 Pearson Education, .