Whether it's humans, animals and plants—as living things we need oxygen to live When we breathe we have organs that work together and form organ systems that work to regulate the oxygen in the environment to every cell that we need. This oxygen is not available in the body of living things We get oxygen from the environment around us Breathing is the activity of inhaling or entering oxygen (O2) from the environment, and emitting carbon dioxide and water vapor through our respirator This time we will learn more about the human respiratory organs Grade 5 | Science | Human Respiratory System Pipo: Lula! Did you know? That our respirator consists of the nose, the larynx (base of the throat), trachea (windpipe), bronchus (branches of the windpipe) and the lungs Lula: Yeah, Pipo! Through the nostrils the air gets its way out and into our bodies Pipo: Besides that, air can also go in and out through the mouth, you know! Lula: But it will be better if we breathe through the nose, Pipo! Because there are mucus and fine hairs These fine hairs are for filtering the air that contains dust, dirt and germs Pipo: Achoo! Absolutely right, Lula! Mucous membrane serves to regulate the temperature of the air that will enter the lungs and regulate the humidity of the air to match the humidity of the body The nose is also a pathway that is directly connected to the next respirator, the throat The throat is the second respirator At the throat, there's the larynx and trachea On the walls of the trachea there is a mucous membrane and fine hairs that always vibrate function to block foreign objects that will enter the lungs Have you ever choked? What about you, Lula? Oh yeah. I have, Pipo. How did that happen by the way? Choking is a reflex motion to remove objects or food that enters the respiratory tract. Lula: Oh, I know! Reflex motion is fast and automatic motion that responds to stimuli from outside the organ, right? Pipo: Yes, Lula Then the larynx connects the nose to the trachea At the end of the trachea there's the bronchus which is a branching that connects the trachea with the left and right lungs Lula: The lungs are located in the chest cavity, right, Pipo? When we breathe air, the air enters the lung Then... where else does it go? Pipo: Through the bronchus to the branches of the bronchus, called the bronchioles then it culminates in the lung bubbles which are also called the alveoli In this alveoli is where the blood vessels are, where there is an exchange of oxygen (O2) with carbon dioxide (CO2) Well, Pipo, did you know that we have two respiratory systems? The chest respiratory system that we commonly do and also the abdominal respiratory system Please explain, Pipo! What's the difference in detail? Pipo: Chest respiratory occurs due to the movement of the ribs by the rib muscles Air intake occurs when the muscles between the ribs contract (constrict), so that the rib cage rises upward causing the chest cavity and lung to enlarge Lula: Oh, so that means air expenditure occurs when the muscles between the ribs relax (slacken) At that moment the rib cage fell to its original position. Causing the chest cavity and lungs to shrink, right? Pipo: Yep, correct! Then what do you think about our abdominal respiratory system, Lula? Lula: Hmm, I'm not really sure yet, Pipo Can you please explain? Abdominal breathing occurs because of the movement of the diaphragm muscle, which is a dividing barrier between the chest cavity and the abdominal cavity Air intake occurs when the diaphragm muscles contract Horizontal diaphragm position causes the chest cavity and lungs to enlarge, which means that air expenditure occurs when the diaphragm muscles relax the diaphragm position is curved upward then cause the chest cavity and lungs to shrink Pipo: You're right, Lula! Lula: Then what if we are out of breath because there is a lot of smoke Pipo: We'll discuss that in our next video!