CELLS.

Slides:



Advertisements
Similar presentations
The Cell Are all cells alike?.
Advertisements

CELLS.
History of Cell Discovery Chapter 4. Microscope view of cells ► Robert Hooke – first to see cells!  designed microscope that he was able to view cork.
The Characteristics of Cells and Cell Theory
4-1 THE HISTORY OF CELL BIOLOGY. THE DISCOVERY OF CELLS  Cell – the smallest unit of life that can carryout all of the processes of life.
Life is Cellular Cell Structures & Functions Biology I.
Cell History Chapter 7
Cell History.
History of the Cell Chapter 4.
Cell Theory STRUCTURE AND FUNCTION OF CELLS:. Discovery of Cells Cells were discovered with the invention of the MICROSCOPE in the early 17 th century.
Chapter 4.1 Introduction to the cell. Robert Hooke 1665 used a microscope to examine a piece of cork. (dead cells) He described it as consisting of “a.
A LOOK AT CELLS
Cells 1. Cells – the basic unit of Life! 2 I. Basic History: Every living thing- from the tiniest bacterium to the largest whale- is made of one or more.
Cells. uEo2ccTPA uEo2ccTPA uEo2ccTPA
Cell Theory Timeline of Scientists & Organization
Cell Theory Explain to students that to start the study of cells we have to learn about the foundations of cells and how they were discovered, as well.
3.1 The Cell Theory VOCABULARY KEY CONCEPTS PROKARYOTE EUKARYOTE
Cell Theory.
Basic Structure of a Cell
4.1 Introduction to the Cell
BASIC STRUCTURE OF A CELL MS. GAYNOR AP BIOLOGY/ CHAPTER 6 (PART 1)
Cells.
Cytology.
Introduction to the Cell 4-1
7.1 Introduction to Cells I. The Discovery of Cells
The Cell Theory A Timeline
Cells.
The Cell Theory A Timeline
Bellringer Please turn in the notes you took over the virtual investigation we did on Monday (Cell and Cell Structure App). Even if you didn’t finish,
Structure and Function of Cells:
History of Cells.
History of Cells.
Introduction to the Cell and Cell Theory
First to View Cells In 1665, Robert Hooke used a microscope to examine a thin slice of cork (dead plant cells) What he saw looked like small boxes What.
Cell Theory Video The Cell Theory Cell Theory Video
Basic Structure of a Cell
Basic Structure of a Cell
History of The Cell.
Life is Cellular Chapter 7 Sec. 1.
The Discovery of the Cell
Cell History & Structure
Cells.
Cell Structure and Function
The Cell The basic unit of life.
Chapter 3, Section 1 The Diversity of Cells.
Chapter 7 Introduction to the Cell Section 7:1
Introduction to Cells.
Chapter 3: Cell Structure and Function
Chapter 7 Intro to the Cell Section 7:1
The Cell Theory.
The Cell Theory.
…..as units of Life. Ch. 7.1 A View of the Cell
The Cell The basic unit of life.
Cell Theory.
CELL THEORY NOTES.
Cell Theory.
Objectives Describe cell theory:
The Cell Theory A Timeline
Basic Structure of a Cell
History of Cell Discovery
Chapter 3 Section 1 The Diversity of Cells Bellringer
Discovery of Cells.
CELLS Page # 35.
An Introduction to Cells
Cell Theory Timeline of Scientists & Organization
Cell Theory Video The Wacky History of Cell Theory
7-1 Life is Cellular.
The Cell Theory – a timeline
Cell theory – types of cells
Discovery of the Cell and Cell Theory
Presentation transcript:

CELLS

CELLS – the basic unit of life!

I. Basic HISTORY: Every living thing-from the tiniest bacterium to the largest whale-are made of one or more cells! Before the seventeenth century, no one knew that CELLS existed.

I. Basic HISTORY: Most cells are too small to be seen with the unaided eye. Not discovered until after the invention of the microscope in the early 17th century.

II. IMPORTANT SCIENTISTS: A Dutch drapery storeowner Anton von Leewenhoek, became the FIRST person to OBSERVE and DESCRIBE MICROSCOPIC ORGANISMS and LIVING CELLS.

II. IMPORTANT SCIENTISTS: 1665: the English Scientist Robert Hooke used a microscope to examine a thin slice of cork and described it as consisting of "a great many little boxes".  It was after his observation that Hooke called what he saw "cells". They looked like "little boxes" and reminded him of the small rooms in which monks lived. So he called them "cells".

Illustration of cork drawn by Robert Hooke:

II. IMPORTANT SCIENTISTS: 1824: the French scientist Henri Dutrochet, concluded that plant and animal tissue were always made up of cells 1831: Robert Brown named the nucleus

II. IMPORTANT SCIENTISTS: In 1838: German Botanist Matthias Schleiden concluded that all plants are made of cells 1839: German Zoologist Theodor Schwann reported that animals are also made of cells

II. IMPORTANT SCIENTISTS: 1845: Felix Dujardin- studied the living cell and noted it contained a material called protoplasm. In 1855: German Physician Rudolf Virchow induced that ALL cells come from preexisting cells.

II. IMPORTANT SCIENTISTS: The COMBINED work of Schleiden, Schwann, and Virchow make up what is now known as the modern CELL THEORY.

III. The Cell Theory Consists of 3 Principles: All living things are composed of one or more cells. Cells are the basic units of structure and function in an organism. Cells come only from the reproduction of existing cells.

IV. TWO TYPES of CELLS: 1. EUKARYOTES = cell that contain a nucleus and other membrane- bound organelles ~Ex: plants, fish, mammals, insects and humans

IV. TWO TYPES of CELLS: 2. PROKARYOTES = cell that lacks a nucleus and other membrane- bound organelles. ~Ex: unicellular organisms such as bacteria and their relatives

V. CELL DIVERSITY: Not all cells are alike. Cells within the same organism show enormous diversity in size, shape, and internal organization.  Your body contains at least 200 different cell types!

VI. CELL SIZE: A few types of cells are large enough to be seen by the unaided eye.  Female egg is the largest cell in the body, and can be seen without the aid of a microscope. Most cells are visible only with a microscope.

VI. CELL SIZE: Most cells are small for 2 reasons: 1. Cells are limited in size by the RATIO between their outer surface area and their volume.  As a cell’s size increases, its volume increases much faster than its surface area.  (see picture on the next slide!)

VI. CELL SIZE: 2. The cell’s nucleus (the brain) can only control a certain amount of living, active cytoplasm.

VII. CELL SHAPE: Variety of shapes. The shape of the cell depends on its function

VII. CELL SHAPE: Ex: Nerve cells that carry information from your toes to your brain are long and threadlike. Ex: Blood cells are shaped like round disk that can squeeze through tiny blood vessels

VIII. CELLULAR ORGANIZATION: Multicellular organisms are made up of many cells, each of which is specialized to perform a distinct function. Digestion, movement, respiration, filtering, etc… Individual cells DO NOT carry out ALL life functions, but rather depend on each other

VIII. CELLULAR ORGANIZATION: Tissue = a group of cells functioning together to perform and activity Ex: muscle and nerve tissues Ex: Plant tissues = stem and root Organs = groups of two or more tissues that function together Stomach, leaf of a plant Cooperation among organs makes life functions within an organism efficient

VIII. CELLULAR ORGANIZATION: SUMMARY: Cells  Tissues  Organs

Study the organelles!