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| the smallest organisms on Earth. (one-celled) |
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| is a flexible structure that holds the cell together. |
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| structure outside the cell membrane. It gives support and protection to these cells. |
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| gelatin like substance; is where cell's activities take place |
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| these are in cells. Specialized cell parts can move around in the cytoplasm and perform activities that are necessary for life. |
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| In the cells of organisms, the hereditary material is in organelle. Inside it is chromosomes. They contain plan for the cell and DNA |
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| In cells, food, water and other substances are stored in ballonlike organelles in the cytoplasm called vacuoles. Sometimes it stores wastes until the cell is ready to get rid of them. |
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(organelles) cellular respiration takes place in this. Food converting to energy.
Waste products of cellular respiration are CO2 and H2O. |
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| plants, algae, and many types of bacteria make food through this process. |
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green organelles chloroplasts capture light energy and combine CO2 from the air with water to make food
green pigment found in leaf cells that help the cell make its own food through photosynthesis |
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| groups of similar cells that all do the same sort of work |
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| different types of tissues working together can form a structure called organ |
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| group of organs that work together to do a certain job. |
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| the cell theory (3 parts) developed after Robert Hooke invented the microscope |
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1. all living things are made of one or more cells.
2. The cell is the basic unit of life.
3. All cells come from cells that already exist. |
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| Difference between plant and animal cells |
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Plant and animal cells have same organelles except for:
Animal cells: have lysosome, don't have chloroplast only cell membrane
vacuole - one or more small vacuoles (much smaller than plant cells)
plant cells: have cell wall and membrane, chloroplasts
vacuole - one large central vacuole taking up to 90% of cell volume
inn animal cell, lyosomes occur in cytoplasm
in plant cell, lysosomes usually not evident
cilia: animal = present, plant = very rare
shape: round = animal cell
rectangular (fixed shape) = plant cell |
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| covered w/ ribosomes/ transports |
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| within the nucleus / RNA's produced there. composed of proteins and nucleic acids. |
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| Helps cell with cell division |
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| packages proteins and crabs for export from the cell |
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| (only for animals) digestive enzymes - break up waste materials and cellular debris |
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| encloses the genetic material in eukaryotic cells. Also serves as a physical barrier seperating contents of the nucleus from the cytoplasm. |
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| Animals and plants are this ____ |
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| store so much fat that the nucleus is pressed against the cell membrane |
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| a hard calcium and phosphorus material surrounds it |
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| have many long branches to send and receive messages |
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| have fibers that can contract and relax(ed) |
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| in leaves, stems, and roots are specialized to move food and water or to support the plant. |
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| cells are organized so they can work together to keep the organism alive |
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| cells are organized so they can work together to keep the organism alive |
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| groups of similar cells that do the same kind of work |
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| 2 or more tissues that work together |
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| groups of organs that work together to perform a job |
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| cells --> tissues --> organ --> organ system |
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| cells --> tissues --> organ --> organ system |
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| The thing that looks like a tube on the top of a microscope |
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| The thing right above (attached) to the bodytube |
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| It turns the objectives around |
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| the arm of a microscope, attaches the bottom to the head |
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| high power, low, medium, you change these powers to see better magnification, etc, turned around by the nosepiece |
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| holds the slideshow so it doesnt move or fall |
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| helps you see better in a large scale |
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| helps you see better in a small scale |
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| the light comes from here. |
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| the base ( floor) that holds everything |
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| How did microscopes help scientists with cells? |
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| helped scientist discover cells, they can be studied, became familiar part of all living things |
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| how does cell theory explain where cells come from? |
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| cells come from cells that already exist, and the cells keep dividing, number of cells increase. |
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| Why is it important for cells to be organized? |
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| If not organized, you going to fail without organization, tissues and organs won't be able to do what they supposed to do, and eventually DIE |
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| major difference between cells? |
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| plant cell has chloroplast and cell wall, animal cell doesn't have it |
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