What is a cell?

Cell theory

Basic stuctions of the cell

Functions of the cell

Types of cell

Cell..this micro universe

 Cells are the basic unit of living organisms.

Smallest unit that can carry out functions of living organisms.

Contain Organelles “ Small organs”

What is a cell?

Robert Hooke (1500’s) was first to use the term “cell” Schleiden (botanist) and Schwann (zoologist) (1800’s) make

individual observations about cells and form the cell theory.

Its postulates state that:

1. All living things are composed of cells

2. The cell is the simplest structural unit of all living things.

3. All cells come from other cells 

The Cell Theory

Basic Structure of the Cell Plasma membrane-the outermost envelope Cytosol - fluid component within the cell Organelles - structures that carry out

functions Nucleus 

Functions of the Cell Communication. Cells produce and receive

electrical and chemical signals Cell metabolism and energy release Inheritance. Each cell contains DNA. Some

cells are specialized as gametes for exchange during sexual intercourse

Types of cell

What do ALL cells have in common?

Cell membrane (aka plasma membrane) Cytoplasm Genetic material (DNA or RNA) Ribosomes (produce proteins) Metabolism

Cell membrane A selectively permeable phospholipid bilayer that forms a barrier between the cell and its environment

 Cytoplasm Liquid substance that all chemical reactions of life take place in Has dissolved ions, macromolecules Fills in around the organelles of the cell

Genetic Material DNA isfound as either: organized chromosomes (eukaryotes) Inside Nucleus single, loosely packed chromosome (prokaryotes)

Ribosomes Two-piece protein-based organelle that makes proteins in both major types of cell Varies structurally in prokaryotes and eukaryotes

Thank you… Kejti Cela