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Porifers

Porifers, also known as sponges or simply sponges, probably appeared about 1 billion years ago. They are supposed to originate from unicellular, heterotrophic beings that cluster into colonies. See the text: Maybe when you shower, you might like to lather up using a synthetic sponge made of plastic or rubber or a vegetable loofah.
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How to store the toothbrush?

People often store their toothbrush in various places, such as inside the bathroom cabinet, in a drawer, in a toothbrush holder or even leaving it over the sink, sometimes using a plastic cover to protect the bristles. But what is the ideal way to keep it so that it is always clean?
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Epithelial cell specialization

The cells of epithelial tissues remain attached to each other by specialized structures, generally called cell junctions. Note these junctions in the figure below. Desmosomes One of the most important cell junctions is the desmosomes (from Greek desmos, binding, and soma, body).
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Everyone has a personal cloud of microbes

No use scrubbing with Super Candida: microorganisms in the human body are ten times larger than the cells themselves. But it doesn't have to go into an identity crisis: Because bacteria and fungi are much smaller than human cells, the total volume of guests is "only" about one liter. Now scientists at the University of Oregon (USA) have found that not only do we emit a cloud with millions of these microbes all the time, but this cloud is unique, allowing us to identify each individual.
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Fractional Distillation

It is used in the separation of homogeneous mixtures when the mix components are liquid. Fractional distillation is based on the different boiling points of the mixture components. The technique and apparatus used for fractional distillation is the same as for simple distillation, only one thermometer should be placed in the distillation flask, so that the distillation of the lowest boiling liquid can be known.
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Glossary - Letter S

Basic sanitation - set of actions, services and works responsible for the collection, treatment and distribution of water for public supply; sewage collection and treatment; collection, transportation, treatment and final disposal of waste. Segmentation - See Cleavage. Natural selection - the process of natural elimination of those less environmentally friendly, who, because they are less likely to succeed than those who are better adapted, leave a smaller offspring.
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