There are 57 billion nematodes for every human on earth; Understanding them will help address climate change. 25 июл. 2019 г.
What is the worm population?
It also calculated that the world's population of soil nematodes is far greater than previously estimated, with 57 billion for every single human, with a total biomass of around 300 million tonnes – approximately 80% of the combined weight of Earth's human population of 7.7 billion people.
Are there worms all over the world?
Earthworms and their aquatic relatives are found all over the world. There are several thousand species! Most live in muck and mud around freshwater, but some live under the sea, and many live in the soil on land.
Do earthworms have 2 Hearts?
Heartbeats: Worms don't have just one heart. They have FIVE! But their hearts and circulatory system aren't as complicated as ours -- maybe because their blood doesn't have to go to so many body parts. Moving around: Worms have two kinds of muscles beneath their skin.
Do worms have brains?
Do worms have brains? Yes, although they are not particularly complex. Each worm's brain sits next to its other organs, and connects the nerves from the worm's skin and muscles, controlling how it feels and moves.
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