1 00:00:04,849 --> 00:00:13,089 Hi everyone, welcome to the unit 3 of our natural science subject, which is all about invertebrates. 2 00:00:15,230 --> 00:00:16,230 Invertebrates. 3 00:00:16,809 --> 00:00:18,050 Mirror word. 4 00:00:20,329 --> 00:00:21,289 Invertebrates. 5 00:00:26,190 --> 00:00:33,670 Invertebrates do not have backbone and skeleton. 6 00:00:33,670 --> 00:00:35,850 Mirror word. 7 00:00:35,850 --> 00:00:51,759 In vertebrates, do not have bone and skeleton vital functions. 8 00:00:53,259 --> 00:00:59,659 In vertebrates, perform three vital functions. 9 00:01:01,100 --> 00:01:06,879 Nutrition, reproduction, interaction. 10 00:01:06,879 --> 00:01:23,640 Mirror word. Invertebrates perform three vital functions. Nutrition, reproduction, interaction. 11 00:01:23,640 --> 00:01:39,879 Nutrition. Carnivores, spiders, and dragonflies only eat other animals. 12 00:01:39,879 --> 00:01:50,640 Herbivores, grasshoppers, only eat plants. 13 00:01:53,920 --> 00:02:06,879 Omnivores, ladybugs, and snails eat both animals and plants. 14 00:02:06,879 --> 00:02:25,590 Mirror word. Carnivores. Spiders and dragonflies only eat other animals. 15 00:02:25,590 --> 00:02:53,069 herbivores, grasshoppers only eat plants, omnivores, ladybugs and snails eat both animals and plants. 16 00:02:53,069 --> 00:03:01,879 For example, spiders are carnivore. 17 00:03:03,740 --> 00:03:08,479 Grasshoppers are, or ladybugs, are omnivore. 18 00:03:09,039 --> 00:03:11,080 And then grasshoppers, what do you think? 19 00:03:12,180 --> 00:03:12,979 Herbivore. 20 00:03:13,719 --> 00:03:14,900 How about snails? 21 00:03:15,180 --> 00:03:15,800 What do you think? 22 00:03:17,620 --> 00:03:18,419 Omnivore. 23 00:03:18,699 --> 00:03:20,240 How about dragonflies? 24 00:03:22,219 --> 00:03:23,099 Carnivores. 25 00:03:25,060 --> 00:03:26,659 Reproduction, one. 26 00:03:27,139 --> 00:03:40,520 Most invertebrates are oviparous animals, but some are ovoviparous animals. 27 00:03:41,419 --> 00:03:44,460 The eggs grow inside their bodies. 28 00:03:45,520 --> 00:03:50,360 They hatch before or after they lay them. 29 00:03:50,360 --> 00:03:54,789 Mirror word. 30 00:03:54,789 --> 00:04:02,210 Most invertebrates are oviparous animals. 31 00:04:04,360 --> 00:04:08,199 Some are ovoviparous animals. 32 00:04:09,900 --> 00:04:13,719 Eggs grow inside their bodies. 33 00:04:15,180 --> 00:04:20,680 They touch before or after they lay them. 34 00:04:20,680 --> 00:04:31,800 Examples of this, animals, beetles, aphids, flies. 35 00:04:34,329 --> 00:04:35,870 Reproduction too. 36 00:04:37,550 --> 00:04:56,170 Sexual reproduction, a male and a female are necessary to create a new organism. 37 00:04:59,379 --> 00:05:09,399 The offspring, or the baby, may be different from their about a sexual reproduction. 38 00:05:10,639 --> 00:05:16,800 One organism makes an identical copy of itself. 39 00:05:16,800 --> 00:05:31,910 The offspring, or the baby, is identical to the, mere word, sexual reproduction. 40 00:05:31,910 --> 00:05:41,790 A male and a female are necessary to create a new organism. 41 00:05:43,350 --> 00:05:50,529 The offspring or the baby may be different from their parents. 42 00:05:52,350 --> 00:05:54,550 Sexual reproduction, B. 43 00:05:54,550 --> 00:06:03,990 One organism makes an identical copy of itself. 44 00:06:05,629 --> 00:06:12,290 The offspring is identical to the pet. 45 00:06:18,379 --> 00:06:19,759 Asexual reproduction. 46 00:06:20,000 --> 00:06:22,800 Let's talk more about asexual reproduction. 47 00:06:23,600 --> 00:06:25,779 Let's start with body. 48 00:06:25,779 --> 00:06:37,759 the body the new organism grows in the parent's body so it grows from the parent so this is the 49 00:06:37,759 --> 00:06:47,500 parent it grows and then separates to form another body so one example is the organism 50 00:06:47,500 --> 00:06:58,230 hydra so the parent hydra and then the bud formation it grows from the parent's body 51 00:06:58,230 --> 00:07:09,240 and then it separates and then there's a new hydra okay so that's for body 52 00:07:09,240 --> 00:07:20,540 how about for fragmenting it broken it breaks down the new organism grows from a part 53 00:07:20,540 --> 00:07:23,540 of its parent. 54 00:07:24,720 --> 00:07:27,259 So, one example is the starfish. 55 00:07:28,339 --> 00:07:29,600 So, from starfish, 56 00:07:30,240 --> 00:07:32,000 and then it breaks into two. 57 00:07:33,839 --> 00:07:36,079 And then from each part, 58 00:07:36,079 --> 00:07:39,899 it grows into two organisms. 59 00:07:43,560 --> 00:07:44,199 Mirror word. 60 00:07:45,639 --> 00:07:47,160 A sexual reproduction. 61 00:07:49,060 --> 00:07:49,339 Body. 62 00:07:50,600 --> 00:07:53,000 The new organism grows 63 00:07:53,000 --> 00:08:08,370 then separates, fragmenting the new organism grows from a part of its parent. 64 00:08:14,060 --> 00:08:15,579 Interaction 1. 65 00:08:18,019 --> 00:08:22,620 All animals interact with their environment. 66 00:08:22,620 --> 00:08:31,279 Most invertebrates live in groups or large communities 67 00:08:31,279 --> 00:08:37,330 Hermit crabs are very social 68 00:08:37,330 --> 00:08:41,250 They live in big groups 69 00:08:41,250 --> 00:08:52,879 Bees live in beehives forming large communities 70 00:08:52,879 --> 00:08:56,110 Mirror word 71 00:08:56,110 --> 00:09:03,840 All animals interact with the environment. 72 00:09:05,919 --> 00:09:15,259 Most invertebrates live in groups or large communities. 73 00:09:17,769 --> 00:09:21,110 Hermit crabs are very social. 74 00:09:22,529 --> 00:09:26,309 They live in big groups. 75 00:09:26,309 --> 00:09:36,519 Bees live in beehives, forming large communities. 76 00:09:40,279 --> 00:09:41,740 Interruption 2. 77 00:09:43,799 --> 00:09:49,580 Most invertebrates have tense organs and react to stimuli. 78 00:09:50,580 --> 00:09:52,700 I think you know the five senses, right? 79 00:09:54,120 --> 00:09:56,840 So example, octopuses. 80 00:09:56,840 --> 00:10:04,679 So octopuses use six arms and two legs to eat and move. 81 00:10:07,789 --> 00:10:15,730 The orchid mantis uses camouflage to attract and hide from its prey. 82 00:10:18,460 --> 00:10:19,019 Mirror word. 83 00:10:20,240 --> 00:10:26,360 Most invertebrates have sense organs to react to stimuli. 84 00:10:26,360 --> 00:10:37,039 To possess, use six arms and two legs to eat and move. 85 00:10:39,039 --> 00:10:49,940 The crooked mantis uses camouflage to attract and hide meat spray. 86 00:10:49,940 --> 00:11:00,820 The thumb invertebrates use sound to communicate. 87 00:11:00,879 --> 00:11:14,500 Prickets or cicadas use sounds to warn of danger and attract opposite stings for reproduction. 88 00:11:17,070 --> 00:11:25,570 Napping shrimps use their claws to snort noise to avoid predators. 89 00:11:25,570 --> 00:11:36,139 Mirrorworms, some invertebrates, use sound to communicate. 90 00:11:36,960 --> 00:11:49,269 Rickets or cicadas use sound to warn of danger or to attract opposite sex. 91 00:11:51,799 --> 00:12:01,639 Napping shrimps use their claws to snort noise or avoid attack. 92 00:12:04,340 --> 00:12:08,039 So that's all for our invertebrates. 93 00:12:08,039 --> 00:12:13,139 So I hope that you keep practicing with me and I'm going to see you in the class. 94 00:12:13,480 --> 00:12:13,860 Bye bye.