Cells

Students should be able to...

• Understand unicellular organisms perform all life processes in a single cell.
• Know types of single celled organisms vs. multi-celled organisms.
• Understand that multicellular organisms have more than one cell and those cells are differentiated to perform specialized functions.
• Understand surface cells (tissues made of cells) are the only ones that can exchange substances with the external environment.
• Cells not on the surface must have transport systems for exchange of substances with the external environment.
• Multicellular organisms have a transport system.

Resources and Videos

• Living vs. Nonliving - Video
• Introduction to Cells - Video
• Unicellular to Multicellular - Video
• Unicellular vs. Multicellular - Video
• Cells- Quizlet
• Bill Nye - Cells
• Build a Cell
• Wonderopolis - How many cells are in the human body?
• Quizlet - Unicellular vs Multicellular
• Cell Types - Gizmo
• Cells - Flexbook
• Specialized Cells - Flexbook
• Cells - Flocabulary

Vocabulary

cell: the basic unit of all living things (related word: cellular)

unicellular: having a single cell, and performing all life processes within a single cell Examples: Euglena, Bacteria, Paramecium, Amoeba

multicellular: having more than one cell that perform different functions in an organism Examples: Dog, Human, Cow, Plant *Cells in a multicellular organism are specialized.* *Multicellular organisms use transport systems to exchange gases with outside environment.*

bacteria: single-celled organisms without an organized nucleus, that can only be seen using a microscope

microorganism: an organism that is too small for people to see with only their eyes

organism: any individual living thing