Digestion – Oxidation reaction
Kids eating food (thanks to USDA) - get ready to digest food! How do you digest food? When animals, including people like you, digest their food, they use an oxidation reaction to [...]
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06, 2017
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05, 2017
Enzymes project – Bread and Spit – Science Activities -Biology
A loaf of bread You can easily taste how your enzymes work breaking down your food into smaller pieces. Do this experiment right after lunch, when you'll have a lot of [...]
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05, 2017
Cell digestion – Parts of a cell – Cell Biology
Amoeba - a one-celled organism - Cell digestion How do cells get energy? All cells have to have some way to get energy from outside themselves, or they will starve [...]
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05, 2017
What is a hydra? Animal Biology and Evolution
Hydra evolution: a hydra budding new hydras Before the hydra For almost three billion years, the only living things on earth were one-celled creatures, either prokaryotes or eukaryotes. What's a prokaryote? And [...]
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05, 2017
What does a stomach do? – Digestion and Evolution
Fish Stomach The first multi-cellular animals like hydras had no stomachs, or you could say they were all stomach, because they were shaped like a bag. Roundworms, a little later, [...]
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05, 2017
What does my liver do? Evolution and Digestion
Fish liver When did the first livers evolve? The earliest beginnings of what became the liver may have been relatives of segmented worms that lived about 600 million years ago. [...]
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05, 2017
What are intestines? Evolution and Digestion
Whale intestines (from Medicine Chest) When did intestines evolve? The first animals to have anything like an intestine evolved around 548 million years ago. These were roundworms, just a few [...]
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05, 2017
Digestive System – Biology and Evolution
Digestive system: A hydra eating: the mouth is where all the tentacles come together,near the center of the picture.The hydra is eating the round bug in its stomach. Before digestive [...]
