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Biology Unit 1: Fundamentals of Science

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Biology Unit 1: Fundamentals of Science
Fundamentals of Science

ASS 1: The structure of cells/tissues and their properties

Alex Willey

By Benjamin Bowles

Contents Page

Page 1 Contents Page Page 2 Introduction Page 3 Introduction (cont.) Page 4 Diagrams of animal cell, plant cell and bacteria cell Page 5 Table of Organelles Page 6 Table of differences between Prokaryotic and Eukaryotic cells Page 7 (a,b,c,d) Cell drawings of onion cells and cheeks cells Page 8 Electron micrograph of an animal cell Page 9 List of four tissue types with diagrams Page 10 List of four tissue types with diagrams (cont.) Page 11 Cell differentiation plus two examples. Page 12 Gastrulation – Endoderm, Ectoderm, Mesoderm with diagrams Page 13 Gastrulation (cont.) Page 14 Stem Cells – Embryonic, Adult Page 15 Stem Cells (cont.) Page 16 Muscle Tissue Page 17 Muscle Tissue (cont.) Page 18 Muscle Tissue (cont.) Page 19 Epithelium Tissue Page 20 Epithelium Tissue (cont.) Page 21 Epithelium Tissue (cont.)

Introduction

Cells (Prokaryotic and Eukaryotic), Tissues, Cell Theory and the Cell Hierarchy The cell is the structural and functional unit of all known living organisms. It is the simplest unit of an organism that is classified as living, and is sometimes called the building block of life. Some organisms, such as bacteria are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion cells; a typical cell size is 10 micrometers, a typical cell mass is 1 nanogram.) The largest known cell is an ostrich egg. The word cell comes from the Latin cellula, meaning a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.

Each cell is at least somewhat self-contained and

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