1 00:00:00,720 --> 00:00:23,609 The nervous system. The nervous system carries out the reaction of the sensitivity. What it means? It receives and interprets information from the environment. It gives orders for our body to respond to stimuli. 2 00:00:23,609 --> 00:00:31,609 It controls and coordinates all the organs and systems in our body. 3 00:00:31,609 --> 00:00:33,609 How it works? 4 00:00:33,609 --> 00:00:39,609 The receptors of our senses capture the stimulus. 5 00:00:39,609 --> 00:00:44,609 The information travels through the nerves till it reaches the brain. 6 00:00:44,609 --> 00:00:50,609 The brain receives and interprets the information and decides how to respond. 7 00:00:50,609 --> 00:00:59,609 The nerves carry response from the brain to the muscles. Our body follows the brain structures. 8 00:01:01,609 --> 00:01:08,609 Parts of the nervous system. Central nervous system, where we find the brain and the spinal cord. 9 00:01:08,609 --> 00:01:19,609 Peripheral nervous system, where we find the nerves that carry all the information from cells to the brain and order from the brain to the body. 10 00:01:20,609 --> 00:01:40,620 This is an automatic movement. Your brain controls your moment and you can stop it. 11 00:01:42,620 --> 00:01:50,620 This is a reflex movement. The reflex movement is a movement that we interpret by our environment. 12 00:01:51,620 --> 00:01:55,620 We can't stop it and it's controlled by our spinal cord. 13 00:01:56,620 --> 00:01:58,620 This is a voluntary movement. 14 00:01:58,620 --> 00:02:22,270 The locomotor system is formed by the skeletal system and the muscular system. 15 00:02:22,270 --> 00:02:29,270 The skeletal system is the structure that leads to our body shape and it consists of bones and joints. 16 00:02:29,270 --> 00:02:37,270 There are where the bones meet. Ligaments are the organs that hold bones together in the joint. 17 00:02:37,270 --> 00:02:42,270 The muscles are organs that allow us to move different parts of the body. 18 00:02:42,270 --> 00:02:50,349 body they can change its shape and length we have internal muscles like the head and the diaphragm 19 00:02:52,669 --> 00:03:00,750 and skeletal muscles that make our bones move our muscles are attacked with bones by tendons 20 00:03:02,509 --> 00:03:11,069 our body has 206 bones i'm gonna name one of the most important bones 21 00:03:12,270 --> 00:03:39,639 The cranio, the clavicle, the sternum, the spine, the ribs, the radius, the pelvis, the femur, the fibula and the tibia. 22 00:03:44,539 --> 00:03:57,539 Our bones meet at joints that are the leg, the knee, the ankle, the hip, the wrist, the 23 00:03:57,539 --> 00:04:05,050 elbow and the shoulders. 24 00:04:05,050 --> 00:04:17,680 He has 639 muscles. 25 00:04:17,680 --> 00:04:22,680 I'm going to tell you some of the most important. 26 00:04:22,680 --> 00:04:43,959 Frontalis. Our body has 639 muscles. I'm going to tell you some of the most important. Frontalis, deltoid, pectorals, biceps, quadriceps, and the gluteus anterior. 27 00:04:43,959 --> 00:05:02,259 Hello to everyone, we are going to talk about the digestive system. 28 00:05:02,259 --> 00:05:05,259 The digestive system is responsible for digestion. 29 00:05:05,259 --> 00:05:10,259 That is the process of breaking down food into nutrients that our body needs. 30 00:05:10,259 --> 00:05:11,259 How it works? 31 00:05:11,259 --> 00:05:19,259 It begins in the mouth, we check the food and it mixes with saliva. 32 00:05:19,259 --> 00:05:24,259 We swallow it and it is pushed into the farm. 33 00:05:24,259 --> 00:05:27,259 It runs down the esophagus. 34 00:05:27,259 --> 00:05:32,259 When it reaches the stomach it mixes with gastric juice. 35 00:05:32,259 --> 00:05:35,259 Then it travels to the small intestine. 36 00:05:35,259 --> 00:05:41,259 In the small intestine it mixes with bile and the pancreas juices. 37 00:05:41,259 --> 00:05:46,259 And in the small intestine it absorbs all the nutrients. 38 00:05:46,259 --> 00:05:50,259 Next, spend a large and fast time the water is absorbed. 39 00:05:50,259 --> 00:05:54,259 Finally, the feces leave the body through the anus. 40 00:05:55,259 --> 00:06:05,870 Respiratory system 41 00:06:05,870 --> 00:06:12,870 Respiration is the process to obtain oxygen our body needs to expel the carbon dioxide. 42 00:06:12,870 --> 00:06:14,870 It has two steps. 43 00:06:15,870 --> 00:06:16,870 Inflation 44 00:06:16,870 --> 00:06:22,870 We breathe the air through the nose, goes to the pharynx, travels through the larynx. 45 00:06:22,870 --> 00:06:26,870 the trachea and the bronchi to the lungs. 46 00:06:26,870 --> 00:06:31,870 In the lungs, when the air runs, the bronchi reach the air sacs, 47 00:06:31,870 --> 00:06:35,870 where the gas exchange takes place. 48 00:06:35,870 --> 00:06:41,870 Our body absorbs the oxygen and expels the carbon dioxide. 49 00:06:41,870 --> 00:06:49,870 Exhalation. The carbon dioxide runs up all the way to the nose and mouth. 50 00:06:49,870 --> 00:07:02,589 That's a joke. When the air breaches the air sac, the blood absorbs the oxygen and expels the CO2.