Voyage to the Lungs and Out the Nose free essay sample

Today we are going to be entering the right femoral vein of a healthy female. I am your pilot Kierra Lewis. While we embark on this journey, make sure that you keep your hands and feet inside the submarine at all times. Fasten your seat belts and let’s start our journey! We will begin our journey in the femoral vein. As you can see the femoral vein is a blood vessel that is responsible for carrying blood from the leg back to the heart via the iliac veins. This is the largest vein in the groin area. Any blockages in this vein can lead to serious medical problems. Oh no! Passengers we have just gotten word that there is a bacterium that is invading the lower lobe of the right lung! So, we will be travelling there via the pulmonary artery. We will get to see what actually happens when a bacterium invades the body and the defense mechanisms that our bodies take to get rid of those invading bacteria. We will write a custom essay sample on Voyage to the Lungs and Out the Nose or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Now we will be leaving the femoral vein and entering the inferior vena cava. As you all can see the inferior vena cava is a large vein that goes through the abdomen. It collects blood from the lumbar veins, hepatic veins, gonadal veins, renal veins, and the phrenic veins. We are now reaching the end of the inferior vena cava and we will now be entering the right atrium that will lead us into the heart. We have now arrived to the right atrium of the heart. As you can see looking out of your windows, the right atrium of the heart receives de-oxygenated blood from the body via the superior vena cava and the inferior vena cava. So everything is connected in terms of blood flow so that the blood will return to the right atrium of the heart. You can also see the contractions that the atrium is making. This is due to the sinoatrial node that sends impulses to the cardiac muscle tissue which causes it to contract in a wave-like manner. Now we are going to enter the tricuspid valve. As you look at the tricuspid valve, you can see that it is the doorway that separates the right atrium from the right ventricle. This valve opens to allow the de-oxygenated blood from the right atrium to flow to the right ventricle. So, let’s increase our speed so we can make it into the right ventricle before the tricuspid valve closes! Hold on tight! Ok my fellow passengers we have now made it into the right ventricle. If you look ahead, the pulmonary valve is closed so that the right ventricle can fill up with blood. So this part of the journey may get a little rough. Now that the ventricle is full of blood, you can see that the right ventricle is starting to contract. Since the right ventricle has contracted the tricuspid valve is closing and the pulmonary valve is opening up. So, let’s move to the pulmonary artery now! As you continue to look ahead and think back on where we have traveled from, you can see that the right pulmonary artery is the blood vessel that transports de-oxygenated blood from the right ventricle to the right lung. We are moving through the pulmonary artery. Now we have reached the end of the pulmonary artery and have reached our destination to the lower lobe of the right lung. Since there is a bacterium invading the lower lobe of the right lung, I will now ask that everyone stays in their seats and make sure your safety belts are fastened because we may experience some turbulence. Thank You! If you look to your right, you can see that the bacterium is trying to invade the lung. You can see the three lobes of the right lung, but at the moment the bacteria seems to be focused on the lower lobe. As you can see the female’s immune system is kicking in and leukocytes are starting to show up on the scene. The leukocytes are beginning to perform nonspecific immunity. Nonspecific immunity is the body’s first line of defense against invading bacterium. As you can see with this immunity the body attacks the bacterium head on to try and kill it. With specific immunity you can see that those leukocytes attack certain bacterium. In this case the body is using nonspecific immunity to kill the bacterium. The leukocytes are engulfing the bacterium and killing them directly. Now that the leukocytes have killed all the bacteria, the â€Å"Battle of the Lung is over. † We will now proceed to leave the body through the nose and end our journey. We are now crossing the alveoli membrane. The alveoli membranes are the respiratory surfaces of the lungs. I need all passengers to pay close attention because we are going to speed up just a little bit because we don’t have much time before the submarine returns to its normal size. Now that we are leaving the alveoli membrane we are now entering the bronchioles. If you look around, the bronchioles are small bronchial tubes that send air to the alveoli. We are now experiencing some major turbulence from the wind gusts so make sure you stay in your seats. Now we will be entering the trachea through the right bronchial tube. If you look around you can see that the trachea is shaped like a pipe and is also known as the windpipe of the body. As we leave the trachea, we are now entering the larynx. The larynx is the voice box where air is directed to the trachea. If you look to your right you can see the vocal cords that we use when speaking. Now we are entering the pharynx, which is also known as the throat. Hold on tight because we will now be leaving the pharynx and exiting the body through the nose. We will also experience some turbulence when exiting through the nose because as you can see, there are long hairs all around that prevent the body from acquiring infections from particles that try to enter the nose. We are now exiting the nose. Thank you for your time and consideration, we will now be returning to normal size.  Now you may gather all of your belongings and exit the front of the submarine. Thank you and have a great day!