Биология

 
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Liver cells (hepatocytes)

Principle

The liver is the central organ of human and animal metabolism. It influences, for example, the blood sugar level, synthesizes various blood proteins, and decomposes toxic metabolic products and other toxicants taken up with the food. The bile which the liver produces accumulates ...

 
Детали

Продукт No: P1443301

Fish gills

Principle

Many animals of rather simple structural organization, for example, paramecium or the earthworm, take up oxygen for all vital processes over their entire body surface. In the fishes, numerous skin folds have developed in the course of evolution, the so-called gills. Water flows past ...

 
Детали

Продукт No: P1443401

Insect wings

Principle

Most insects possess 1 or 2 pairs of membranous wings. Their venation may differ distinctly. Similarities in the venation pattern indicate a close genetic relationship of the species. Compare the venation pattern of various insect species.

 
Детали

Продукт No: P1443501

The mouth parts of insects

Principle

The insects have developed various mouthparts in the course of evolution, depending on their mechanism of food intake. Examine the mouthparts and explain the structures.

 
Детали

Продукт No: P1443601

Planaria

Principle

Planarians belong to the class of the free-living flatworms (Turbellaria) and these, in turn, belong to the phylum of platyhelminthes (flatworms). They occur in both freshwater and marine environments, feeding as predators, for example, on the eggs of fishes and shrimps in ...

 
Детали

Продукт No: P1443701

Nematoda

Principle

Threadworms (nematodes) are whitish or colorless roundworms of very simple organization, which occur almost everywhere in moist soils, in water, and also as parasites in plants, animals and humans.

Benefits

  • Experiment is part of a complete solution set with a total of 50 ...
 
Детали

Продукт No: P1443801

Brine shrimp (Artemia salina)

Principle

There is a genus of very small crustaceans living in salt lakes. These animals feed on other microscopic organisms such as algae and bacteria. The brine shrimps lay eggs from which larvae develop. These grow up to juvenile crustaceans within a few weeks. When salt lakes dry up ...

 
Детали

Продукт No: P1443901

Water flea (Daphnia)

Principle

Water fleas are not actually fleas but belong to shield shrimps (branchiopods) just like the brine shrimps do.

Benefits

  • Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
  • With student worksheet, appropriate for all ...
 
Детали

Продукт No: P1444001

The ciliated epithelium of mussels

Principle

In numerous animals, the surface of mucous membranes is ciliated similar to the bronchial mucosa in humans. Mussels not only breathe with their gills but they are also able to feed themselves by using them. The cilia growing on the surface of their gills produce a water current. ...

 
Детали

Продукт No: P1444101

The spore capsules of ferns

Principle

Weedy fern plants are often found in moist forests. In the tropical regions, however, there are even tree ferns that can be up to 10 meters tall. The ferns do not belong to the flowering plants and therefore do not produce any seeds. Like the mosses, they reproduce by spores. On ...

 
Детали

Продукт No: P1444201

Mould fungi growing on food

Principle

Surely you have seen on several occasions that molds have grown on food. Molds live on organic matter composed of carbohydrates, fat, and protein. As foodstuffs contain these substances and the required moisture, they make an ideal substrate. The macroscopically visible ...

 
Детали

Продукт No: P1444301

Ciliates in a hay infusion

Benefits
  • Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
  • With student worksheet, appropriate for all class levels
  • With detailed instructor information, incl. sample microscopy image
  • Optimized for tight schedules, i.e. ...
 
Детали

Продукт No: P1444401

Colony-forming ciliates in an aquarium

Principle
Life in the aquarium is more variegated than one may perceive at first glance. You can not only see how fish feed but also observe the movements of gill covers and how water flows through a fish's body. Besides you can observe mating behavior and territorial fights among the ...

 
Детали

Продукт No: P1444501

Volvox

Principle
A microscopic water analysis predominately reveals unicellular organisms. But occasionally you can also see groups of algae that resemble a mulberry. They consist of a number of single algae which are held together by mucilage. Such an assemblage is referred to as a colony. The ...

 
Детали

Продукт No: P1444601

Diatoms in moor water

Principle
Many people are afraid of the dangerous moor because one might sink and drown in it. For others, however, this is an interesting place. Archeologists find traces of early settlements in moors. Paleobotanists search for pollen which plants left behind in prehistory. Botanists find ...

 
Детали

Продукт No: P1444701

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