1 00:00:00,000 --> 00:00:07,759 let's now move on to lesson number two from a cell to an organism 2 00:00:08,960 --> 00:00:17,949 in this picture we are representing millions of cells first of all what is a cell 3 00:00:17,949 --> 00:00:34,030 Mirror world. A cell is the smallest living unit. Remember, we need a microscope to see 4 00:00:34,030 --> 00:00:47,219 individual cells. These are alga cells under a microscope. In this case, we can see a population 5 00:00:47,219 --> 00:00:59,219 bacteria on a battery dish. One cell, many cells. Remember that we can classify organisms into 6 00:01:00,020 --> 00:01:07,780 unicellular organisms and multicellular organisms. Let's talk about the number. 7 00:01:07,780 --> 00:01:25,959 In the world, unicellular organisms only have one cell. On the other hand, multicellular organisms have many cells. Good job. 8 00:01:25,959 --> 00:01:42,689 In your world, in unicellular organisms, the single cell carries out the three vital functions. 9 00:01:45,040 --> 00:01:52,239 On the other hand, in multicellular organisms, different cells have a different function. 10 00:01:52,239 --> 00:02:06,239 This means that in unicellular organisms, the cell has to do the nutrition, interaction and reproduction. 11 00:02:06,239 --> 00:02:20,240 In multicellular organisms, there are cells just for nutrition, other cells for interaction and other cells for reproduction. 12 00:02:20,240 --> 00:02:29,840 Some examples of unicellular organisms are alga and bacteria. 13 00:02:29,840 --> 00:02:38,840 Some examples of multicellular organisms are plants and animals. 14 00:02:38,840 --> 00:02:42,840 Let's move on to the following slide. 15 00:02:42,840 --> 00:02:51,530 This is the pyramid with the levels of organization of multicellular organisms. 16 00:02:51,530 --> 00:03:21,680 Level number one is the cell. Your world. Cells are the smallest living unit. Level number two. Your world. Cells group together and form tissues. Good job. 17 00:03:21,680 --> 00:03:45,469 Level number 3. In your world, tissues group together and form an organ. Some examples of organs are the lungs to breathe, the heart in the circulatory system, among others. 18 00:03:45,469 --> 00:03:56,469 Level 4. Mirror world. Organs work together and form systems. 19 00:03:56,469 --> 00:04:08,300 Some examples of systems are the circulatory system, the digestive system, the respiratory system. 20 00:04:08,300 --> 00:04:26,029 level number five, mirror world, systems form a living organism. For example, all the human systems 21 00:04:26,029 --> 00:04:37,129 form a complete human being. Finally, in this lesson, we are going to learn some parts of animal 22 00:04:37,129 --> 00:04:46,069 and plant cells. Remember that some cells are included in both animal and plant cells, 23 00:04:46,069 --> 00:04:59,110 but other parts are only for plant cells. Part number one is the cell wall. The cell 24 00:04:59,110 --> 00:05:10,470 wall makes the plant rigid, supports the plant. It's all included in plant cells. 25 00:05:10,470 --> 00:05:20,790 Part number two is the cell membrane. The cell membrane controls the substances 26 00:05:20,790 --> 00:05:30,550 entering and leaving the cell. It is included in both animal and plant cells. 27 00:05:30,550 --> 00:05:44,149 Part number three are the vacuoles. Vacuoles contain water. Vacuoles are 28 00:05:44,149 --> 00:05:54,420 included in both animal and plant cells. Part number four is the nucleus. The 29 00:05:54,420 --> 00:06:04,899 nucleus controls the cell functions. The nucleus is included in both animal and cell plants. 30 00:06:06,500 --> 00:06:14,980 Finally, the chloroplasts. The chloroplasts contain chlorophyll and they are included 31 00:06:14,980 --> 00:06:35,509 only implant cells parts of a cell cell wall cell membrane black walls nucleus and chloroplast 32 00:06:36,790 --> 00:06:43,350 on the one hand we have the parts of the cell and on the other hand we have some metaphors 33 00:06:43,990 --> 00:06:49,829 Can you guess which of the cell parts correspond to the different metaphors? 34 00:06:49,829 --> 00:06:57,189 Let's see. First of all, let's start with the cell membrane. Do you remember 35 00:06:57,829 --> 00:07:08,069 which metaphor corresponds to the cell membrane? Think about it. Great, the door. Why? 36 00:07:08,069 --> 00:07:15,750 because the cell membrane is in charge of controlling the substances that enter and leave 37 00:07:16,709 --> 00:07:25,910 the cell. Great. The second one is the back wall. Do you remember which metaphor corresponds to the 38 00:07:25,910 --> 00:07:38,639 back wall? Great, the water well. Part number three is the cell wall only included in plant cells. 39 00:07:38,639 --> 00:07:40,680 Do you remember the metaphor? 40 00:07:42,000 --> 00:07:43,180 Think about it. 41 00:07:44,660 --> 00:07:46,600 Great, it's the armor. 42 00:07:48,939 --> 00:07:50,480 What about the nucleus? 43 00:07:51,379 --> 00:07:55,300 Do you remember which metaphor corresponds to the nucleus? 44 00:07:56,980 --> 00:08:02,720 Great, the nucleus is the brain that controls all the functions, 45 00:08:03,360 --> 00:08:06,579 nutrition, production, interaction. 46 00:08:06,579 --> 00:08:14,420 And finally, the chloroplast is the part of the plant cell that could be represented by 47 00:08:14,420 --> 00:08:20,019 a solar panel as it is included or involved in the photosynthesis.