1. Levels of Organization
From Cells to Organisms
7.3.3 e2

2. Cells Plant Cell Complex cells. In multicellular organisms
Bacteria Cell
Simple cells. Single-celled organisms
Animal Cell
Complex cells.
In multicellular organisms

3. Definition: structure within the cell that has a specific role.
Organelle
Definition: structure within the cell that has a specific role.

4. Organelles & Functions
Cell membrane: Surrounds the cell; Function: control what goes in and out of the cell and hold all the cell’s contents together. Is semipermeable or selectively permeable, meaning that some things can cross the membrane, but some things cannot.

5. Organelles & Functions
Cell nucleus: control center of the cell; Function: contains the cell’s genetic information that controls all the activities of the cell.
Mitochondria: has ‘ruffled’ inner membrane; Function: provides the energy needed to power the cell - converts food/sugars into energy.
Organelles & Functions

6. Organelles & Functions
Chloroplast: found in plant cells only; Function: make sugar/food through photosynthesis.
Cell wall: rigid outer barrier of plant. Function: supports and protects the cell.

7. Definition: a group of similar types of cells that work together to carry out specific tasks.
Four main types of tissues in animals:
Epithelial
Connective
Nervous
Muscle
Tissues

8. Epithelial
Covers surface of the body and lines body cavities Examples: forms glands; outer layer of organs, skin.
Function: protection, structure

9. Connective
Function: Provides structure and support; often connects other types of tissue together. Supporting framework.
Examples: bones, fat, tendons, ligaments, cartilage

10. Nervous
Function: Communication. Reacts to stimuli; carries messages to and from brain.
Examples: Makes up brain, spinal cord and nerves.

11. Muscle Function: Movement through contraction of muscle fibers.
Can be attached to bones (skeletal); in the heart (cardiac); in the walls of organs such as in the digestive tract (smooth)

12. Plant tissue types
Dermal tissue: provides protection and helps reduce water loss.
Ground tissue: storage and support, is where photosynthesis takes place.
Vascular tissue: moves water and nutrients through a plant.

13. Definition: a group of different tissues working together to perform a particular job.
Examples include the stomach, intestines, heart, lungs, skin, bones, kidneys and liver.
We will be going through these in class.
Organs

14. Organ Systems
Group of organs that work together and perform a specific task.
In each box, write the main organs in that system, and the function of the system.

15. Integumentary System Respiratory System Made up of: skin, hair
Function: Exterior protection
Respiratory System
Made up of: lungs, trachea, diaphragm
Function: Take in oxygen (O2), release carbon dioxide (CO2) – gas exchange

16. Digestive System Skeletal System Made up of: stomach, intestines
Function: Breaks down food-nutrients
Skeletal System
Made up of: skeleton
Function: Structure and support

17. Muscular System Nervous System Made up of: muscles Function: Movement
Made up of: brain, sense organs, nerves
Function: Carry and interpret messages

18. Endocrine System Circulatory System Made up of: thyroid, pituitary
Function: Regulate hormones
Circulatory System
Made up of: heart, arteries
Function: Circulate blood

19. Immune & Lymphatic System
Made up of: Appendix, lymph nodes
Function: Maintain health
Excretory System
Made up of: kidney, colon
Function: Remove waste

20. Put the systems together?
We get an organism!
Definition: something that has all the characteristics of life
Characteristics of life include movement, growth and development, reproduction, use of energy, cellular structure and chemical makeup, response to stimuli