1. The Four Levels of Organization
Cells – form tissues Tissues- form organs Organs-form organ systems Organ Systems-form organisms such as you

2. Cells
What is a cell? A Cell is the smallest unit of life where all of the life processes are carried on. “Cell” in Latin means “little rooms” Robert Hooke was the first person to -describe cells. He called them “little rooms”

3. Cell Theory All organisms are made of one or more cells.
The cell is the basic unit of all living things.
All cells come from existing cells.

4. What Are the Two Kinds of Cells?
Prokaryotes – Bacterial cells
Eukaryotes- Plant and Animal Cells
Prokaryote is an organism made of:
one cell, does not have a nucleus, does not have membrane covered organelles, has a cell wall & circular DNA.
2. Eukaryote is an organism made of:
one or more cells, has a nucleus, and membrane-covered organelles.

5. What is an Organelle? An organelle is simply a cell part.
Eg. Cell membrane
Nucleus
Mitochondrion

6. Looking at living things
LIFE PROCESSES
Looking at living things

7. Living things
Although all living things look different from each other, they all have seven things in common.
These seven things are called life processes.
Something is only alive if it does all seven processes.

8. THE SEVEN LIFE PROCESSES

9. 1
All living things move

10. Animals move their whole bodies to get from one place to another.
Plants turn towards the light and their roots grow down into the soil.

11. All living things reproduce2
All living things reproduce

12. Animals have babies.
New plants grow from seeds.

13. All living things are sensitive/respond to change3
All living things are sensitive/respond to change

14. All living things respond to changes
All living things respond to changes. Living things notice changes in their surroundings and react to them.
Eg. Plants grow towards the light.
Eg. People react to the temperature around them.

15. All living things need nutrition/take in energy4
All living things need nutrition/take in energy

16. Food is used to provide energy.
Green plants make their own food using sunlight.
Animals eat plants or other animals.

17. All living things excrete/release waste5
All living things excrete/release waste

18. Waste substances must be removed from the body.
Plants and animals both need to get rid of waste gas and water.

19. All living things respire/breathe6
All living things respire/breathe

20. Plants and animals use the oxygen in the air to turn food into energy.

21. 7
All living things grow

22. Babies grow into adults.
Seedlings grow into plants.

23. The seven life processes
1 Move
2 Reproduce
3 Sensitive/respond to change
4 Nutrition/take in energy
5 Excrete/release waste
6 Respire/breathe
7 Grow

24. Use the first letter from each process to help you remember them.
Move
Reproduce
Sensitive/respond to change
Nutrition/take in energy
Excrete/release waste
Respire/breathe
Grow
They spell MRS NERG

25. This is MRS NERG !
Can you remember what each of the letters in her name stand for ?

26. Move
Reproduce
Sensitive
Nutrition
Excrete
Respire
Grow

27. Well done !

28. Tissues There are four kinds of tissues:
Epithelial tissue – covers and protects other tissues
Muscle tissue-is made of cells that contract and relax to produce movement.
Nervous tissue – sends electrical signals through the body.
Connective tissue – joins, supports, protects, insulates, nourishes, and cushions organs. It also keeps organs from falling apart.

29. Organ Systems are made of Organs Which system goes with….?
Move – Muscular system
Reproduce- Reproductive system
Sensitive/respond to change- Nervous system
Nutrition/take in energy-Digestive system
Excrete/release waste- Excretory system
Respire/breathe- Respiratory system
Grow- Endocrine system
Heart – Circulatory system/Cardiovascular
Skin – Integumentary system
Bones – Skeletal system