Week 3 general

Q2. Week 3

Cells

The smallest unit of life

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DISCOVEry

Cells were discovered by Robert Hooke in 1665 using a compound microscope that he designed.

There are millions of types of cells!

Muscle Cells

Fat cells

Fungal cells

Red blood cells

Hair cells

Yeast cells

White blood cells

Egg cells

Algal cells

Nerve cells

Sperm cells

Rod cells

Cone cells

Bacterial cells

and so many more...

Cells come in many shapes and sizes

Cell Theory

All organisms are composed of cells.

Cells are alive and the basic living units of organization in all organisms.

All cells come from other cells.

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two main types of Cells

Prokaryotic

Eukaryotic

What do you notice?

What is in a Cell?

Assignment 3.2 Cell Structure and Types

What is the most important organelle in an animal cell and why?

What is the most important organelle in an plant cell and why?

What is the most important part of a bacterial cell and why?

• A virus is a microscopic particle that can infect a cell.
• Viruses are primarily composed of a protein coat, called a capsid, and nucleic acid.
• Unlike living organisms, viruses cannot reproduce on their own.
• Instead, viruses infect host cells, taking over the cell’s machinery to produce more viruses.

The Lytic Cycle

The Lytic Cycle

The Lytic Cycle

Cells are ALIVE!

cells are the builDing blocks of life

Cells tissue organs organ systems organisms

Eukaryotes

Have membrane-covered organelles.Are larger and have a nucleus. Include plants, animals, and fungi.

Cells reproduce

Prokaryotes

One Celled organisms No nucleus Example: Bacteria