Chris Sacchi and Kurt Friehauf - animal and also plant cells with elementary school students

regional elementary college (5 th graders) – plant cells and pet cells v Dr. kris Sacchi (and me, the course!)

The first and fifth graders indigenous the neighborhood elementary institution visited university to find out the distinction betwee plant and animal cells using the microscopic Digital Imaging Lab.  The concerns of the job were: 1) are plants and also animals really made of cells? 2) how do pet cells and also plant cell differ? The microscope we used had a digital camera attached come it so we might take photographs the the different cells because that comparison.

We very first looked at plant cells. 

The image to the right mirrors plant cell from the elodia plant - a floating, flower tree common in ponds that has actually leaves the are only two cells thick!  The eco-friendly specks space chloroplasts, which room the small packets inside the cell containing chlorophyll (the molecule that enables plants to transform sunlight + carbon dioxide + water into sugar).  The chloroplastic float roughly in the cell fluid (called cytoplasm) and shot come orient themselves so the they space exposed to as much light as possible.  Click right here to watch a 6 Mb Quicktime®  movie of this elodia plant cells experiencing "cytoplasmic streaming."  The cell is type of like a vegetable stew, gradually convecting and churning.
most of the cell parts (called organelles) are virtually invisible because they space colorless.  Dr.

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Sacchi put a small salt water top top the slide to watch what would happen.  The insides of the cell squished up and the chloroplast every bunched together since the water in the cytoplasm was "sucked out" that the cell by a phenomenon called "osmosis." 
We also looked in ~ the cells of an onion bulb.  because the onion bulb grows underground, that doesn"t see any sunlight and also so it doesn"t have any chloroplasts for photosynthesis.  Not having actually all those chloroplastic in the way, we want to see the nucleus of the cell, which is wherein the DNA is stored.  We included a fall of iodine come the slide, i m sorry acted together a stain that made the cell core visible.  The little circular dot inside each cell is the nucleus.
currently it to be time to to compare plant cell with pet cells, yet where would certainly we uncover an animal? We discovered an pet by spring in the mirror! utilizing a toothpick, us scaped part cells off the inside of ours cheeks.  You deserve to imagine how often the skin ~ above the inside of her cheeks rubs versus your this -- anytime you move your mouth!  Every time you relocate your mouth, a few cheek cell (called epithelial cells) obstacle off and also you swallow them.  that made me think.  The cell are very small, so we don"t swallow very much every time, however if ns were to include up every one of the times that ns have swallowed in my entirety life, i wonder if every one of those the swallowed cheek cell would add up to it is in as large as my whole body!
We stained the cells making use of a chemical referred to as methylene blue, which reacts through acids to revolve purple.  Those components of the cabinet that consisted of some acid rotate purple.  The soft purple circles in every cell room the cabinet nucleus - why carry out you expect the cell core stained purple?  What molecules are acids that you would find there?  (Hint: the molecules space shaped like a twin helix!) girlfriend can likewise see small dark violet dots ~ above the surface of the cells.  Those room bacteria!  Everyone has billions the bacteria cultivation in their mouths and all over your bodies!  It"s natural.  few of those bacteria room actually great for united state - lock help us in numerous ways and also all they ask is for a little place to live! So, carry out you see any type of differences between plant and animal cells?  I"m a teacher, so friend didn"t think i was walk to just tell girlfriend the answer appropriate away, go you?  My project is to set people up learn things for themselves! You have the images - research them and you can number it out! Everybody had a possibility to usage the microscopes - it to be a funny day because that all!