1 slide

2 slide

3 slide

The simplest are diverse (70 thousand species) unicellular animals living in water bodies and moist soil. Many of the simplest animals are as small and simple as some of the cells of large animals. But they differ from them in that they are able to live independently. Unicellular animals are a well-coordinated organism that provides nutrition, respiration, excretion, reproduction, growth, development and metabolism. Protozoa are very important consumers of bacteria and unicellular algae, as well as unicellular animals. The structure of protozoa (Fig. 1): 1-membrane, 2-cytoplasm, 3-contractile vacuole, 4-nucleus. The simplest can be divided into 4 systematic groups. These are rhizopods, radiolarians, sunflowers and sporozoans. Flagellates and ciliates are also isolated separately. 1 2 3 4 Fig. one

4 slide

6 slide

Sunflowers are one of the smallest groups of protozoa. It has only a few dozen species that live in fresh waters. The body of most sunflowers resembles the "sun", but is devoid of a mineral skeleton. Many sunflowers are free-floating, but there are also attached individuals. They feed on animal organisms. Solnechnik

8 slide

Radiolarians are single-celled, rarely colonial, free-living protozoa with a mineral skeleton in the form of amazingly beautiful formations. Bizarre outgrowths significantly increase the surface area of ​​the body, which contributes to their movement in the water column. Radiolarians are distributed mainly in warm seas. radiolarians

11 slide

Amoeba lives in the silt at the bottom of small freshwater reservoirs. This small unicellular animal (0.2-0.5 mm), looking like a gelatinous lump, successfully competes with other protozoa. The body is covered with a plasma membrane. All actions of the amoeba are controlled by the nucleus. The cytoplasm is in constant motion. If its microflows rush to one point on the surface of the amoeba, a protrusion appears there. It increases in size, becomes an outgrowth of the body. This is a pseudopod that attaches itself to silt particles. All the contents of the amoeba gradually flow into it. This is how the amoeba moves from place to place.

12 slide

Amoeba Diet Amoeba is an omnivore. Its food consists of bacteria, unicellular plants and animals, as well as decaying organic particles. When moving, the amoeba encounters food and flows around it from all sides, and it ends up in the cytoplasm (Fig. 2). A digestive vacuole is formed around the food, where the digestive secrets that digest the food enter. The vacuole with undigested food remnants moves to the surface of the body of the amoeba and its contents are thrown out. This way of capturing food is called cellular ingestion. Amoeba can also feed on liquid food using another method - cellular nutrition. Rice. 2

13 slide

Asexual reproduction of amoeba Amoeba reproduction is asexual and is carried out by dividing in two (Fig. 3). The nucleus is divided by mitosis first, then the constriction and elongation of the cytoplasm begins. In this case, the daughter chromosomes diverge to opposite poles and two identical daughter amoeba are separated from each other. Fig.3

14 slide

Cyst The amoeba feeds and reproduces in summer. In autumn, when cold weather sets in, the amoeba stops eating, its body becomes rounded, a dense protective shell is released on its surface - a cyst is formed. The same thing happens when the reservoir dries up. In the state of a cyst, the amoeba endures unfavorable living conditions for it. On the onset favorable conditions the amoeba leaves the cyst shell (Fig. 4). She releases pseudopods, begins to feed and multiply. Cysts carried by the wind contribute to the settlement of amoebas. Fig.4

15 slide

1. Food source for other animals. (They make up the 1st link in the food chain). 2. Perform the role of orderlies, cleaning water from bacteria and decaying substances. 3. Serve as indicators of water purity. 4. Contribute to geological exploration serve as a guideline for oil and gas exploration. 5. Participate in the formation of limestone deposits. 6. Participate in the circulation of substances. 7. Influence soil-forming processes. 8. Pathogens of diseases of domestic animals and humans.

16 slide

Not all protozoa are microscopic! Shells of extinct foraminifers were found, the diameter of which is 18 cm!!! Everyone knows honey bees, and beekeepers can tell you that bees have diarrhea that ends in their death. Single-celled animals are to blame for this. Not many people know that fish often die due to a disease in which their muscles liquefy. This disease is caused by unicellular animals kudos.

19 slide

About the author This presentation was made by Margarita Sukhova, a 7th grade student of the Education Center of the Gatchina Secondary School No. 8. I take a great interest in computer graphics, music, modern dances and I like to travel.

slide 3

radiolarians

Radiolarians build their shells from transparent silicon dioxide. The skeletal structures of both spiked stars and reticulated boxfish are the most exquisite of all marine zooplankton. Radiolarians reproduce by fission; only some species have a sexual process. Skeletons of radiolarians form silt, which eventually turns into sedimentary rock - radiolarite.

slide 4

Solnechnik

One of the smallest groups of protozoa. It has only a few dozen species that live in fresh waters. Unlike radiolarians, sunflowers lack an intracellular mineral skeleton. Solnechniks have a fairly large size - up to 1 mm. They are easy to spot in the ditches as tiny balls floating near the bottom.

Slide 7

ciliates

Ciliates move with the help of the coordinated work of numerous cilia. Some cilia are able to perceive mechanical irritations. Sucking ciliates do not have cilia, but there are a large number of tentacles that bite into prey. Most ciliates are predators. Some of them have trichocysts between the cilia, which pierce the victim when attacked. Food (small algae, fungi, bacteria) is swallowed by the pharynx. Ciliates evolved from primitive flagellates; there are 6000–8000 species of them. They live in both fresh and sea water (both in the water column and near the bottom), in soil and wet mosses.

View all slides

1 of 19

Presentation on the topic: Protozoa

slide number 1

Description of the slide:

slide number 2

Description of the slide:

slide number 3

Description of the slide:

Protozoa Protozoa are diverse (70 thousand species) unicellular animals living in water bodies and moist soil. Many of the simplest animals are as small and simple as some of the cells of large animals. But they differ from them in that they are able to live independently. Unicellular animals are a well-coordinated organism that carries out nutrition, respiration, excretion, reproduction, growth, development and metabolism. Protozoa are very important consumers of bacteria and unicellular algae, as well as unicellular animals. The structure of protozoa (Fig. 1): 1-membrane, 2-cytoplasm, 3-contractile vacuole, 4-nucleus. The simplest can be divided into 4 systematic groups. These are rhizopods, radiolarians, sunflowers and sporozoans. Flagellates and ciliates are also isolated separately.

slide number 4

Description of the slide:

slide number 6

Description of the slide:

Sunflowers Sunflowers are one of the smallest groups of protozoa. It has only a few dozen species that live in fresh waters. The body of most sunflowers resembles the "sun", but is devoid of a mineral skeleton. Many sunflowers are free-floating, but there are also attached individuals. They feed on animal organisms.

slide number 7

slide number 8

Description of the slide:

Radiolarians Radiolarians are single-celled, rarely colonial, free-living protozoa with a mineral skeleton in the form of amazingly beautiful formations. Bizarre outgrowths significantly increase the surface area of ​​the body, which contributes to their movement in the water column. Radiolarians are distributed mainly in warm seas.

slide number 9

slide number 10

slide number 11

Description of the slide:

Amoeba Amoeba lives in the silt at the bottom of small freshwater reservoirs. This small unicellular animal (0.2-0.5 mm), looking like a gelatinous lump, successfully competes with other protozoa. The body is covered with a plasma membrane. All actions of the amoeba are controlled by the nucleus. The cytoplasm is in constant motion. If its microflows rush to one point on the surface of the amoeba, a protrusion appears there. It increases in size, becomes an outgrowth of the body. This is a pseudopod that attaches itself to silt particles. All the contents of the amoeba gradually flow into it. This is how the amoeba moves from place to place.

slide number 12

Description of the slide:

Amoeba Diet Amoeba is an omnivore. Its food consists of bacteria, unicellular plants and animals, as well as decaying organic particles. When moving, the amoeba encounters food and flows around it from all sides, and it ends up in the cytoplasm (Fig. 2). A digestive vacuole is formed around the food, where the digestive secrets that digest the food enter. The vacuole with undigested food remnants moves to the surface of the body of the amoeba and its contents are thrown out. This way of capturing food is called cellular ingestion. Amoeba can also feed on liquid food using another method - cellular nutrition.

slide number 13

Description of the slide:

Asexual reproduction of amoeba Amoeba reproduction is asexual and is carried out by dividing in two (Fig. 3). The nucleus is divided by mitosis first, then the constriction and elongation of the cytoplasm begins. In this case, the daughter chromosomes diverge to opposite poles and two identical daughter amoeba are separated from each other.

slide number 14

Description of the slide:

Cyst The amoeba feeds and reproduces in summer. In autumn, when cold weather sets in, the amoeba stops eating, its body becomes rounded, a dense protective shell is released on its surface - a cyst is formed. The same thing happens when the reservoir dries up. In the state of a cyst, the amoeba endures unfavorable living conditions for it. When favorable conditions occur, the amoeba leaves the cyst shell (Fig. 4). She releases pseudopods, begins to feed and multiply. Cysts carried by the wind contribute to the settlement of amoebas.

Description of the slide:

It's interesting Not all the simplest animals are microscopic! Shells of extinct foraminifers were found, the diameter of which is 18 cm!!! Not many people know that fish often die due to a disease in which their muscles liquefy. This disease is caused by unicellular animals kudos. Everyone knows honey bees, and beekeepers can tell you that bees have diarrhea that ends in their death. Single-celled animals are to blame for this.

slide number 17

Description of the slide:

slide number 18

Description of the slide:

conclusion While working on this presentation, I learned a lot about protozoa that is not written in a biology textbook. It was interesting to create this presentation, since there is not much information about the simplest ones and I had to look through a large amount of information and choose the most important and place it in this work. It turned out that the simplest are not at all so simple and their world is amazing and diverse! I hope you enjoy my presentation help you get to know these little animals better!

slide number 19

Description of the slide:

Protozoa

Slides: 11 Words: 444 Sounds: 0 Effects: 0

Variety of animals. The simplest include animals consisting of one or more cells - colonies. representatives of the simplest. History reference. Type classification Protozoa. Class Sarcodaceae (Rhizopods). Eat -? Tolerate adverse conditions - ? Class Sporoviki. Number of species Lifestyle Structure Habitat Example Value. Flagella class. Ciliates class. - Protozoa.ppt

Type protozoa

Slides: 6 Words: 91 Sounds: 0 Effects: 19

Lesson protozoa

Slides: 7 Words: 265 Sounds: 0 Effects: 36

Subject educational project The simplest are among the first on Earth. Question of the educational topic: What are the biological features of protozoa? Subjects: Biology, ecology, geography, informatics. What can be found in the droplets of aquarium and pond water? What is the life of a ciliate shoe? How do protozoa react to influences environment? Can nature exist without protozoa? Self-study topics: Research presentation results: - Lesson Protozoa.ppt

Protozoa biology

Slides: 9 Words: 262 Sounds: 0 Effects: 41

Kingdom Protozoa. General signs Kingdoms Protozoa. They reproduce by cell division. May form cysts. Amoeba proteus. Variety of Protozoa. Arcella vulgaris. Acantharia. Plasmodium vivax. Eimeria. Opalina frog. Infusoria shoe. Questions on the topic Protozoa. Name the four classes of the Kingdom Protozoa. Give examples of protozoa that are dangerous to humans. - Protozoa Biology.ppt

The simplest animals

Slides: 9 Words: 166 Sounds: 0 Effects: 59

Protozoa. Worms. Shellfish. Lesson topic. What is the role of different animals in ecosystems? Breathe, create organic matter, grow, multiply, bloom. Plants can. Animals can breathe, swallow prey, move, grow, reproduce, feel. Animals and plants can breathe, grow, reproduce. General. Differences Animals can move, swallow prey, feel. Shell amoeba. Solnechnik. Flagellates. Foraminifera shells. Infusoria - shoe. Purify water. Increase soil fertility. They serve as food for small animals. Cause disease. - The simplest animals.ppt

The simplest organisms

Slides: 38 Words: 1789 Sounds: 0 Effects: 0

Biology grade 7 protozoa

Slides: 14 Words: 365 Sounds: 0 Effects: 87

Single clitin organisms

Slides: 22 Words: 633 Sounds: 0 Effects: 95

Lesson topic: One-celled organisms. The manifestation of colonialism. Task for the lesson: Establish the fundamental principles of the functioning of single-celled organisms. “Tell me and I will forget. Show me and I will remember. Give me the opportunity to work myself, and I will learn.” Chinese wisdom. Single cell prokaryotes. Kingdom of Drob'yanka Viddіl Bacteria Viddіl Cyanobacteria. Single-clitin eukaryotes. Kingdom of Roslini. Single-celled organisms that establish colonies. Work in groups. Laboratory "Single cell eukaryotes". I. Laboratory “Single cell prokaryotes”. Presentation of the project “Ways of life for prokaryotes”. Prevention of any bacterial ailments is the vikonnannya of the rules of hygiene. - Single-clitin organisms.ppt

unicellular animals

Slides: 19 Words: 1033 Sounds: 0 Effects: 44

Variety of protozoa

Slides: 18 Words: 244 Sounds: 0 Effects: 17

Variety of Protozoa. Get to know the types of Protozoa Get to know the meaning of Protozoa. Types of Protozoa. Subtype Sarcodal Foraminefera. Subphylum Sarcodal Radiolarians. Subtype Flagellates. Type of spores. Complex life cycle. Meaning of the Protozoa. variety of protozoa. There are 70 thousand species of Protozoa. The role of Protozoa in the life of nature and man is significant. What is the name of the disease caused by Plasmodium Malaria? What is the name of the protozoan that causes Amoebiasis? What type of lamblia is it? When did the Protozoa appear on Earth? What types of Protozoa do you know? - Variety of protozoa.pptx

Types of protozoa

Slides: 33 Words: 4202 Sounds: 6 Effects: 61

Pimenov A.V. Topic: "Subkingdom Protozoa". Among unicellular animals, there are organisms with a mixed (mixotrophic) type of nutrition. Reproduction is sexual and asexual. About 1.5 million animal species are known. Kingdom Animals. general characteristics subkingdoms Protozoa. Unicellular animals and colonial organisms. Structure. One or more cores. The outer membrane, together with compacted ectoplasm, can form a pellicle. Some have a sink. Digestion is intracellular with the help of the digestive vacuole. There are mixotrophic organisms. Selection. Breath. The vast majority of protozoa are aerobic organisms. - Types of Protozoa.ppt

Flagellated protozoa

Slides: 10 Words: 291 Sounds: 0 Effects: 0

Type of Infusoria

Slides: 7 Words: 242 Sounds: 0 Effects: 0

type of infusoria. The macronucleus has a polyploid set of chromosomes and regulates metabolic processes. The micronucleus contains a diploid set of chromosomes and is involved in the sexual process. Reproduction is repeated 1 - 2 times a day. Several generations later, life cycle ciliates have a sexual process. Suvoyka. When the body contracts, the stalk also contracts and twists spirally. The entoplasm contains a ribbon-like macronucleus with an adjacent spherical micronucleus. They reproduce by division. Cysts are spherical. They are found all over the world, caught in fresh and marine waters. - Type Infusoria.ppt

Protozoa test

Slides: 25 Words: 1217 Sounds: 0 Effects: 220

Biological auction "Protozoa". Characteristic features of protozoa. Microscopic dimensions Unicellular. They move with the help of pseudopods, flagella or cilia. They have a variety of shapes and symmetry. Subkingdom Protozoa. Sarcode class. Class Flagellates. Ciliates class. Amoeba common. Amoeba structure. Pseudopods. cytoplasmic membrane. Contractile vacuole. Core. Digestive vacuole. Cytoplasm. Respiration and excretion. Breathe the entire surface of the body. The secretion is provided by the contractile vacuole. Amoeba nutrition. Reproduction. Cyst formation. 2nd lot Class Flagellates. - Test Protozoa.ppt

unicellular organisms

Slides: 20 Words: 1109 Sounds: 29 Effects: 33

In the world of unicellular organisms. unicellular plants. Chlorella. Euglena green. unicellular animals. Infusoria. Feeding infusoria. Volvox. Mold mushrooms. Penicillium. Missing words. Unicellular algae. Cell structure. Cells of all organisms. Unicellular fungus. Cell structure. Icebergs. - Unicellular organisms.ppt

Type Eyelash

Slides: 24 Words: 1072 Sounds: 0 Effects: 0

Type of infusoria or ciliary. Goals. Type of lesson: mastering new knowledge. Lesson stages. Challenge stage. At the stage of "Challenge" - actualization of knowledge. Stage "Comprehension". Primary fixation of the material. Fizkultminutka. Stage "Reflection". The ability to name and show the organelles of ciliates. At the stage of "Reflection" the analysis of new information was carried out. Brief self-analysis of the lesson. -