1. LEVELS OF CELLULAR ORGANIZATION
Thursday, March 25th

2. AIM: What are the different levels of cellular organization?
THURSDAY, MARCH 25TH
AIM: What are the different levels of cellular organization?
Do Now
What does multicellular mean?
Many Cells
What do you think is more complicated? Cells or Organs? Why? (2 sentences)
Organs are more complicated than cells. An organ has many cells working together in order for it to work.

3. LEVELS OF CELLULAR ORGANIZATION
Work together to sort the cards at your table from smallest to biggest (2 minutes)

4. LEVELS OF CELLULAR ORGANIZATION
BIG
ORGAN SYSTEM: Two or more tissues working together to perform a specific function/job for the organism
ORGANS: Tissues work together to perform a specific activity
TISSUES: Similar cells working together to do the same functions/jobs.
CELLS
SMALL

5. HOW DOES OUR BODY WORK TOGETHER TO CIRCULATE BLOOD?
organs work together to make
CIRCULATORY SYSTEM
tissues work together to make
The HEART
(Organ)
cells work together to make
HEART TISSUES
organelles work together inside…
HEART
CELLS
Organelles

6. Why isn’t there cellular organization in unicellular organisms?
CHALLENGE QUESTION
Why isn’t there cellular organization in unicellular organisms?

7. GROUP CHALLENGE GAME! Who remembers the rules? RULES:
Work as a team to answer the questions
Keep your answers secret until time is called
No talking while your answers are raised
No cheering or booing
Team with the most points wins!
ARE YOU READY?

8. 1. Which of the following is a unicellular organism?
QUESTION 1
1. Which of the following is a unicellular organism?
a. human c. bacteria
b. lion d. tree

9. QUESTION 2
2. The structure that regulates what enters and leaves the cell is called
a. the nucleus.
b. the nuclear membrane.
c. the cell wall.
d. the cell membrane.

10. 3. Only eukaryotic cells have a. DNA. c. ribosomes.
QUESTION 3
3. Only eukaryotic cells have
a. DNA.
c. ribosomes.
b. membrane-bound organelles.
d. cytoplasm.

11. QUESTION 4
4. A structure within a cell that performs a specific function is called a(n)
organelle.
tissue.
organ tissue.
biocenter.

12. 5. Which cell structure controls most cell activities?
QUESTION 5
5. Which cell structure controls most cell activities?
a. cytoplasm c. cell membrane
b. nucleus d. chloroplast

13. 6. Organisms composed of more than one cell are called ____________.
QUESTION 6
6. Organisms composed of more than one cell are called ____________.
a. unicellular c. multicellular
b. virus d. tissue

14. QUESTION 7
7. Which of these is a unicellular organism? A B C D

15. QUESTION 8
8. Multicellular organisms are made up of more than one kind of cell because:
a. unicellular organisms can’t move so don’t need lots of cells.
b. multicellular organisms are more complex than unicellular organisms and need different cells for different functions.
c. unicellular organisms don’t do all the seven things living things do.
d. multicellular organisms don’t get energy.

16. a. organ systems, organs, tissues, cells
QUESTION 9
9. Which of the following is the correct order of organization of structures in living things, from simplest to most complex?
a. organ systems, organs, tissues, cells
b. tissues, cells, organs, organ systems
c. cells, tissues, organ systems, organs
d. cells, tissues, organs, organ systems

17. a. tissues, cells, organ systems, organs
QUESTION 10
10. Which of the following lists an organism’s levels of cellular organization in order from SMALLEST to LARGEST?
a. tissues, cells, organ systems, organs
b. cells, organs, tissues, organ systems
c. tissues, cells, organs, organ system
d. cells, tissues, organs, organ systems

18. QUESTION 11
11. What is the name for a group of cells that work together to perform a certain task in an organism?
a. tissue c. species
b. organ d. genius

19. ORGAN SYSTEM CELL TISSUE ORGAN
12. FILL IN THE LINE WITH THE APPROPRIATE LABEL FROM ABOVE!
Blood cell: _____________________
Circulatory System: ________________
Brain tissue: _________________________
Heart: _______________________________