1. Living Things

2. Candle Demo

3. Organism:
Any living Thing

4. Living Things
Living things are made of cells & carry out life processes
Ingestion
digestion
removal of waste
Response to stimuli
growth and repair
gas exchange
reproduction

5. 1.Living things are made of cells
A cell is the basic building block that makes up all living things
Cells are alive & found in ALL organisms
Cells contain all materials necessary
for life & can perform al life functions!
Think of Legos!

6. What Do Cells Do? Cells perform numerous functions
cellular respiration/use energy
waste breakdown and removal
growth and division
and cellular transport

7. All living things are made of 1 or more cells
Plant Cells
Human Skin Cells

8. Unicellular Organisms
Organisms made of only ONE cell
Example: Bacteria/Protista
Less advanced
Unicycle They still meet all the characteristics of living things

9. Multicellular Organisms
Multi = many
Organisms made of many cells
Examples: Plants, Animals, & Fungi

10. Multicellular vs. Unicellular
Multicellular Lion
Unicellular Paramecium
Made of more than one cell
Made of only one cell
Multicellular vs. Unicellular

11. Unicellular organisms perform all activities inside one cell!

12. Asexual Reproduction

13. Sexual Reproduction

14. Multicellular Organisms have specialized cells that are organized

15. Levels of Organization in Cells
Cells in multicellular organisms must be
organized to perform specialized functions.
*Division of Labor
Cells Tissues Organs Organ System

16. Levels of Organization
Tissue- group of cells performing same function
Organ- group of tissues performing same function
Organ System- group of organs performing same function

17. Paramecium Video

18. Cellular Organization Video
6:20-11:50min

19. Review The simplest level of organization is: The cell Tissues Organs
Organ systems

20. Homeostasis
Cells & living things must keep stable conditions to survive
Homeostasis: the process of maintaining stable conditions.
Ex: Maintaining body
temperature

21. Review Which is NOT an example of homeostasis?
A. Keeping a constant body temperature
B. Maintaining steady blood sugar
C. Sweating to keep cool
D. These are ALL examples

22. Ingestion & Digestion
Some organism ingest or eat food, while others make their own through photosynthesis
Organisms must digest (break down) food in order to obtain energy

23. Waste Removal
Organisms must be able to get rid of unnecessary or harmful wastes = excretion

24. Response & Stimulus Stimulus: a change in the environment
Response: a movement, action, or change in behavior because of a stimulus
Example: Blinking
Lights on/off: Clapping

25. Growth & Repair Growth = get bigger Development = change as you grow
Organisms grow by producing more cells
Development = change as you grow
Organisms must be able to repair damaged cells!

26. Gas Exchange Organisms exchange gases with the environment through:
Photosynthesis & Cellular Respiration
Both processes are important for obtaining energy for cells

27. Reproduction Sexual Reproduction: requires two parents
Offspring will be different
Example: Humans & Animals
Asexual Reproduction: requires one parent
Offspring will be clones
Examples: Bacteria

28. Review A flower bends toward the sunlight…what is the stimulus?
The flower bending
The sunlight
The wind
The temperature

29. Needs of Living Things

30. How do organisms STAY Alive?
They need:
Shelter
Water
Food
Gases (O2 & CO2)
Living Space
Each organisms has a range of conditions it must meet to stay alive!

31. Shelter
A place to be safe from predators & the elements (weather)

32. Water Must have water for all chemical activities
Water makes up most of our cells

33. Food Provides an energy source All living things need energy
Autotrophs: Make their own
Heterotrophs: Must find food

34. Living Space Need space to find food, water, mates
If there is not enough space = competition between organisms

35. Review Which is NOT a need of living things? Food Water Reproduction
Shelter