1 00:00:00,430 --> 00:00:04,429 We are Hector, Irene, and Alina. 2 00:00:04,429 --> 00:00:10,429 We are going to talk about worms and models. 3 00:00:10,429 --> 00:00:18,429 In this video, you are going to learn about some characteristics, types, and vital functions about them. 4 00:00:18,429 --> 00:00:20,429 General characteristics 5 00:00:20,429 --> 00:00:22,429 Worms 6 00:00:22,429 --> 00:00:46,600 They have bilateral symmetry, they don't have legs, they tend to live in humid climates, and they can be divided into flatworms, nematodes, and annelids. 7 00:00:46,600 --> 00:01:02,979 Flatworms. They have a head at the front of their bodies and they are the simplest animals. 8 00:01:02,979 --> 00:01:15,640 They have a structure called scolex that allows them to enter themselves intestinal walls. 9 00:01:15,640 --> 00:01:23,640 They have innately cylindrical bodies. 10 00:01:23,640 --> 00:01:41,640 Some are parasites, others live independently. They have a mouth and an anus. They feed on the hot blood or the liquids of plants and animals. 11 00:01:41,640 --> 00:02:01,319 Anelites. They have a segmented cylindrical body. They can live in aquatic environments or terrestrial environments, and they have no circulatory system. 12 00:02:01,319 --> 00:02:11,270 Mollusks. Generally, they have some bodies. They have lateral asymmetries. 13 00:02:11,270 --> 00:02:19,270 The majority of them are but are some exact exceptions like snails or slugs. 14 00:02:19,270 --> 00:02:25,270 Their bodies are made of an external layer or mantle that surrounds the internal organs. 15 00:02:25,270 --> 00:02:28,270 They also have a shell which is a protective layer. 16 00:02:28,270 --> 00:02:45,650 They have a complete digestive system, and many of them have an organ in their mouth 17 00:02:45,650 --> 00:02:47,330 called radula. 18 00:02:47,330 --> 00:03:04,879 They can be grouped in bevelers, gastropods, and cephalopods. 19 00:03:04,879 --> 00:03:14,879 They have these valleys that are joined by hinges, they don't have heads and their organs aren't the only ones. 20 00:03:14,879 --> 00:03:30,240 The food of this type is usually except and they use it during the 7th or 9th. 21 00:03:30,240 --> 00:03:49,840 Gastropods. They are mainly aquatic and they have an external spiral shell and they have a defined head and has a mouth and four tentacles. Generally, they are herbivores and they have a U-shaped digestive tube due to their curved shell and have a hard and long TV system. 22 00:03:49,840 --> 00:04:20,350 The fellow birds. Their food is next to their heads and they all have internal shells, except for octopuses. They are all aquatic. They have a well-defined head with pointed eyes next to it, divided into a set of tentacles which consume guts that help to catch prey. They are carnivores, and they have a large mouth. They have a big snake jaw to bite and make their prey. 23 00:04:20,350 --> 00:04:27,800 Vital functions. Nutrition. 24 00:04:28,600 --> 00:04:41,149 worms, flatworms, tapeworms. They are aterotrophs. They are aterotrophs and parasites. They have 25 00:04:41,149 --> 00:04:46,430 some nutrients in the animal's intestine directly through their bodies. They don't 26 00:04:46,430 --> 00:04:53,629 have a respiratory system through the mouth, it enters the food and cases go out. They 27 00:04:53,629 --> 00:05:36,639 have a complete a community system they have an incomplete digestive system nematodes 28 00:05:36,639 --> 00:05:40,879 Some are parasites, but others can live independently of any host. 29 00:05:40,879 --> 00:05:48,000 The digestive system has a mouth and an anus. They feed on the whole world or on other liquids 30 00:05:48,000 --> 00:05:51,439 in plants and animals. They have a complete digestive system, 31 00:05:51,439 --> 00:05:57,920 no respiratory system or circulatory system. Dermatodes have a unique excretory system 32 00:05:57,920 --> 00:06:03,680 consisting in simpler species of one or two one-celled glands, cold-brained cells, 33 00:06:03,680 --> 00:06:08,079 and a more highly specialized form of longitudinal respiratory ducts. 34 00:06:12,720 --> 00:06:13,279 ANALYSIS 35 00:06:15,439 --> 00:06:21,360 They have a digestive tube with a mouth and an anus. Earthworms feed on the remains of animals 36 00:06:21,360 --> 00:06:28,000 and plants. The majority of aquatic analysts feed on plants, and others feed on wild vertebrates. 37 00:06:28,639 --> 00:06:34,000 The aquatic analysts reduce and others carry out cutaneous respiration, 38 00:06:34,000 --> 00:06:43,000 Which is why terrestrial fishes need to have moist skin and they have a closed circulatory system. 39 00:06:43,000 --> 00:06:54,639 They have a complete digestive system. 40 00:06:54,639 --> 00:06:58,639 They have a mollusk. 41 00:06:58,639 --> 00:07:02,639 They have a complete digestive system. 42 00:07:02,639 --> 00:07:10,639 Many of them have an organ in their mouth, the radula. 43 00:07:10,639 --> 00:07:19,540 A radula is a thin tongue that allows some models that scrape and grip food. 44 00:07:19,959 --> 00:07:32,939 Aquatic models build a terrestrial space, so a cavity that works in the same way as the lungs. 45 00:07:37,399 --> 00:07:40,720 Brothers, they don't have a head and their organs are developed. 46 00:07:40,720 --> 00:07:45,720 They don't have a retina either because they are filter feeders. 47 00:07:45,720 --> 00:07:47,720 They breathe through gills. 48 00:07:47,720 --> 00:07:53,720 They have a complete digestive system and an open circulatory system. 49 00:07:53,720 --> 00:07:59,720 The excretory system, excretory organs of bevelers are a pair of nephrivia. 50 00:07:59,720 --> 00:08:15,120 Each of these consists of a long looped glandular tube which opens into the body cavity just beneath the head and a bladder to store the blood. 51 00:08:15,120 --> 00:08:38,120 They have a defined category. They have a defined head that is long and tentacles. They are generally herbivores and have access to their own cells. 52 00:08:38,120 --> 00:09:03,960 Aquatic gas supports, briefs, slugs, gills, terracots, one ear, an organ that functions as a lamp, that they have an air and open circulatory system, which distributes a liquid that contains nutrients and oxygen, degrading to their tissues. 53 00:09:03,960 --> 00:09:14,519 They have a well-defined head with pointed eyes. 54 00:09:14,519 --> 00:09:21,460 Next to it is a foot, which is divided into a set of tentacles, with suction cups that 55 00:09:21,460 --> 00:09:23,960 help the animal to catch prey. 56 00:09:23,960 --> 00:09:24,960 They are carnivores. 57 00:09:24,960 --> 00:09:31,799 Apart from Mirabula, they have a big-shaped lobe to bite and brain their prey. 58 00:09:31,799 --> 00:09:35,120 They breathe through yields and they have a close circulatory system. 59 00:09:44,299 --> 00:09:44,980 Interaction. 60 00:09:45,519 --> 00:09:45,940 Warps. 61 00:09:46,659 --> 00:09:47,559 Bad warps. 62 00:09:49,460 --> 00:09:57,159 They are slow-moving and some species have bright colors to warn their prey. 63 00:09:57,799 --> 00:10:03,159 They have developed a sense of defense to deter predators. 64 00:10:03,440 --> 00:10:06,159 Concentration nerve centers from warps. 65 00:10:06,159 --> 00:10:11,159 They can regenerate a thin part when it is broken. 66 00:10:11,159 --> 00:10:15,159 They have a stabilization of the nervous system. 67 00:10:15,159 --> 00:10:22,159 Stabilization refers to the concentration of nerve centers in the front part of the animal's body. 68 00:10:22,159 --> 00:10:43,120 Nematodes. They can interact with other nematodes, the host, and other pathogens, viruses, bacteria, and fungi. 69 00:10:43,120 --> 00:11:01,679 Analysts. The habitat of subparasitic nematodes coupled with their sensory reduction indicates that chemical stimuli may modulate most aspects of the behavior. 70 00:11:01,679 --> 00:11:10,679 They interact with humans when being used, or they also interact with other species. 71 00:11:10,679 --> 00:11:25,100 It is a collection of neuronal bodies found in the voluntary and autonomic branches of 72 00:11:25,100 --> 00:11:34,179 the peripheral nervous system composed of a pair of paired cerebral and cerebral pairs 73 00:11:34,179 --> 00:11:35,179 of nerves. 74 00:11:35,179 --> 00:11:41,179 It does not have a flat creeping sole but is blade-like and pointed for digging. 75 00:11:41,179 --> 00:11:48,179 The muscles mainly responsible for movement of the foot are the interior and posterior pedal vertebrae. 76 00:11:48,179 --> 00:11:57,919 Cephalopods. The cephalopod nervous system is the most complex of her knee invertebrates. 77 00:11:57,919 --> 00:12:09,919 The nervous system has moving, predatory lifestyle and their complex behavior and its flexibility of response to different environmental situations. 78 00:12:09,919 --> 00:12:22,970 Some of their main characteristics are higher brain and nervous system function. 79 00:12:22,970 --> 00:12:40,970 Gastropods. A series of peridanglia connected by major nerve cords and a number of smaller, rich nerves using a single appending. 80 00:12:40,970 --> 00:12:57,610 The food for many gastropods, the power of locomotion, is provided by muscular waves moving along the vertical surface of the food. 81 00:12:57,610 --> 00:13:18,179 The probes of these webs begin to complete a substrate by deep layer of petal mollusk reproduction. 82 00:13:18,179 --> 00:13:32,240 Flatworms. They are hemophrodites and have the cavity for cell fertilize. 83 00:13:32,240 --> 00:13:35,240 They can do sexual or sexual reproduction. 84 00:13:41,019 --> 00:13:42,019 Nematodes 85 00:13:43,019 --> 00:13:50,019 They perform sexual reproduction in the eggs inside the host which are then released inside the host's excrement. 86 00:13:51,019 --> 00:13:54,019 Other animals ingest them and the cycle continues. 87 00:13:59,659 --> 00:14:00,659 Analytics 88 00:14:01,659 --> 00:14:03,659 The majority perform sexual reproduction. 89 00:14:03,659 --> 00:14:10,220 Some are hermaphrodites, but there are only one individual mixed with another to reproduce, cross-fetalization. 90 00:14:10,960 --> 00:14:22,480 Many of them have a modified ring called the clitoris that creates a morphine substance which allows the genital pores of both parents to be together. 91 00:14:22,480 --> 00:14:47,470 They perform models. They perform sexual reproduction by internal fertilization. They are oviparous and their development can be direct or indirect. Some species are hermaphrodite. 92 00:14:47,470 --> 00:14:51,919 Importance of the group. 93 00:14:52,879 --> 00:14:53,440 Worms. 94 00:14:55,379 --> 00:15:03,879 Their feeding and boring activities incorporate organic residues and minerals into the soil, 95 00:15:03,879 --> 00:15:12,919 In changing the composition, human formation, nutrient cycling, the soil of structural development, 96 00:15:13,600 --> 00:15:19,259 parasitic worms have involved strategies to block parts of the human immune system. 97 00:15:19,899 --> 00:15:21,960 And there are also main players in allergies. 98 00:15:22,639 --> 00:15:26,559 There are 28 species of S1 in the UK. 99 00:15:26,559 --> 00:15:38,179 Mollusks. Mollusks are among the most diverse and abundant animal groups, 100 00:15:38,179 --> 00:15:42,179 inhabiting many active and industrial environments. 101 00:15:42,179 --> 00:15:49,179 They are important ecosystem engineers helping to structure aquatic bottom environments 102 00:15:49,179 --> 00:15:55,179 and providing habitat protection and puts a wide array of other taxa. 103 00:15:55,179 --> 00:16:05,460 Molluscs are important in a variety of ways. They are used as food for decoration in jewelry and in scientific studies. 104 00:16:06,000 --> 00:16:11,320 They are even used as rope, material, and becoming supplements. 105 00:16:12,159 --> 00:16:18,899 Two natural products of molluscs used for decoration in jewelry are pearls and lacquer. 106 00:16:18,899 --> 00:16:32,940 We hope you found the types of words or modules the right functions and the main characteristics. 107 00:16:32,940 --> 00:16:40,940 If you have any questions or if you don't understand something, you can ask, remember, talk. 108 00:16:40,940 --> 00:16:46,940 Some words are inside us and are good for ourselves. 109 00:16:46,940 --> 00:16:50,440 End.