cells-the units of life. smallest organisms on earth made up of only one cell sentence: bacteria...
TRANSCRIPT
CHAPTER 2 VOCAB
Cells-The Units of Life
1. BACTERIA
Smallest organisms on Earth
Made up of only one cell
Sentence: Bacteria are 1 celled organisms.
SALMONELLA BACTERIA
2. CELL MEMBRANE Flexible structure that holds a cell together
Boundary between cell & its environment
Helps control what enters & exits the cell
“gate keeper” of cell
Sentence: A cell’s membrane is its “gatekeeper”
3.CELL WALL Found in structure of plants, algae, fungi, & many bacteria types
Supports & protects cell membrane
Sentence: Plants have a rigid cell wall.
4. CYTOPLASM Gelatin like substance inside cell membrane
Contains water, chemicals, and cell parts (organelles)
Where cell’s activities take place
5. ORGANELLE Specialized cell parts that move around in a cell
Perform jobs necessary for cell to live
6. NUCLEUS Cell organelle that contains hereditary material (DNA in chromosomes)
Directs most of cell’s activities
“cell boss”
7. VACUOLE Balloon like cell organelle Can store food, water, & other
substances “cell closet”
8. MITOCHONDRIA Provides usable energy for the cell Where process of cellular respiration
takes place “cell powerhouse”
9. PHOTOSYNTHESIS Process plants, algae, and many
bacteria use to make food
10. CHLOROPLAST Green organelle in a plant’s leaf Where photosynthesis occurs “cell kitchen”
11. TISSUE Groups of similar cells that all do
the same work
12. ORGAN Structure made of 2 or more
types of different tissue Work together to do a certain job
13. ORGAN SYSTEM Group of organs that work
together to perform a certain job