JKitchen_HS120_unit9Assignment 1 A Journey; In, Through, and Out Jennifer Kitchen HS130-01 Unit 9 Assignment Kaplan University November 19, 2011
JKitchen_HS120_unit9Assignment 2Welcome to the Biological News NetworkHello, this is Jenni Kitchen reporting for the Biological News Network. I am on assignmentat the Center for Study of Biological Functioning. Today I will be taking a tour of thedigestion, circulation, and urinary systems. To do this I will be shrunk down to a minusculesize of 8 microns. One micron, also known as a micrometer, is one-millionth of a meter.This is extremely tiny, small enough to be swallowed Mr. Nod Binkins, a 55 year old man.He will consume me with a hamburger, French fries, and a root beer. I will be places in thetop of the hamburger amongst the sesame seeds.You may remember this, the Miniaturization Machine, from a previous broadcast. It willmake me and this pill-shaped submarine into a mini-me and mini-sub. So, let me get set-upinside the sub… …I am now inside and ready to be miniaturized. In order for this to work Imust cut communications for a few moments… … Okay, I am back and the sub and I arenow a mere 8 microns long. This makes me very small and I will easily be consumed by Mr.Binkins. This is much too small for any person to see with the naked eye but you should beable to see me on the Magnification Screen.Here I am on the top of a bun ready to be consumed. I will be digested, circulated, andexpelled on this great journey. I would like to thank everyone who has tuned in to sharethis amazing experience with me. Let’s go…The Pathof DigestionMr. Binkins is has started eating. I wonder how many bites it will take before I enter themouth. Since he has already taken a bite he is already digesting. Actually he started the
JKitchen_HS120_unit9Assignment 3digestive process even before he took that first bite. This process starts as soon as a personstarts salivating at the thought of food. Now is the bite we been waiting for… … Here we go!Mr. Binkins is now chewing… … Look at how the teeth come down. Take notice of the roof(we are by the soft palate in the front of the mouth) and now the floor of the mouth as weare swept around the tongue! See the sublingual and submandibular ducts spitting saliva?We are experiencing the process of chewing which is called mastication! It causes thesalivary secretions to combine with food and starts breaking the food particles down. Andnow we are being swallowed… … The Uvula, trapdoor,folded up to block food from goinginto nasal cavity as we slip down over the root of the tongue into the Pharynx and past theLarynx and down the Esophagus, the highway to the Stomach!!! That was exhilarating!!!We have come into the stomach viathe Gastroesophagal Sphincter. Did you see the musclemoving as the food and our sub were swallowed down the Esophagus? Now we will bemoving toward the Small Intestine, which is 20 feet in length!We are being moving through the gastric juice in the body of the stomach. See the way thefood particles are being broken down into chime? We will now making our way throughthe pylorus and we exit the stomach, entering the small intestine through the pyloricsphincter.The small intestine is divided into 3 sections. We are in the first part, the duodenum. Fatsare being broken down by bile salts! Now in the jejunum… and now we enter the ileum…here we must shuttle our sub up under the liver so we can get go through the process ofabsorption and enter the bloodstream. Let’s do this by following these water solublevitamins, C and the Bs. They are on a different adventure but going the same way for
JKitchen_HS120_unit9Assignment 4now!Here we go through the mucosal membrane. We are entering the bloodstream via theSuperior Mesenteric Vein. We enter the Hepatic Portal Vein and are on our way throughthe liver!Circulatory PathHere we go up theInferior Vena Cava. Into the right atrium and through the tricuspid valveto the right ventricle, what a ride! The pulmonary semilunar valve is opening and here gointo the pulmonary trunk to the left pulmonary artery, hold on tight! We are now enteringthe lung, traveling down the pulmonary arteriole. We enter the alveolar sac pick up oxygenand begin the circulation back to heart. We travel with this oxygenated blood back to theheart through the left pulmonary vein. We go through left atrium through the mitral valveinto the left ventricle and into the aorta.We are traveling fast down the aorta and mustmake a turn… here at the left renal artery! Do you see how large the renal artery is? We arehere… the left kidney.On the Urinary PathRenal cortex… Renal Medulla… Medullary Pyramids! Afferent Arterioles… This is where weenter the Nephron! Renal Corpuscle! Across the Glomerular Membrane into Bowman’sCapsule! Awesome!This is an exciting ride! The pressure is so high! Already we are out of the blood, filteredthrough with all the water and dissolves substances. Now we enter the ProximalConvoluted Tubule and are on a roller coaster ride!!! Down the Loop of Henle… And Up!!!Into the Distal Convoluted Tubule… Wow! Awesome! And into the Collecting Tubule. We
JKitchen_HS120_unit9Assignment 5travel now to the Calyx, where we will come into the Ureter. We exit the Renal Papilla. Weare in the Renal Pelvis now and here we go… traveling down the Ureter. We will be goinginto the Urinary Bladder from here. The Bladder lies in the Pelvis, so you know we will beending our journey soon.As we enter the Bladder notice the wrinkled walls. This is because this special epithelialmembrane is connected to deeper muscular layer which will smooth the walls as theBladder expands. See it as it happens! Amazing!Now we are traveling through the Internal Urinary Sphincter. Since we are in Mr. Binkinswe are now in the Prostate. In women there is no Prostate so we would already be exitingthe through the External Urinary Sphincter and out the Urethra. Now, we make theExternal exit in Mr. Binkins. The Urethra of men is also a longer than that of women andso… I had time to say that and… we are already out!!! Voided we have been! I will be rightback with you all in a moment after the Biological News Sub and made back to normal size.HomeostasisWhat an awesome adventure that was! I would like to let you all know how important theprocesses we just went through are. As you seen there was a lot more happening than justa meal being eaten and micturition (urination). Within the past hour, since we have beeneaten, we have gone through the digestive process, traveling with the fluids and particlesthat made the meal, into the blood stream through the heart, lungs, and back to lungs andback to heart made our way through the urinary system. These processes are ways to thebalance of our bodies. We need food for the nutrients that keep all our body systemsworking properly, homeostasis. We need the vitamins and minerals(micronutrients) and
JKitchen_HS120_unit9Assignment 6the carbohydrates, proteins, fats, and glucose(macronutrients) to help the body functionsof all the systems.More so homeostasis requires a balance of the fluids in the Cells(intracellular fluid), outside the cells (interstitial fluid), and in the blood (plasma). Foodsand drinks provide the fluids we require to keep this balance. Excess fluid and fluid wastesare excreted through the body in the form of expelled air, sweat, urine, and in the feces. Wetraveled the way of we did to go on an adventure that would take us through more systemsthan just digestion. We wanted you to see how food goes through digestion into the bloodcirculation via the Hepatic Way and how we go through the Heart to enter the Lungs andreturn to the Heart with fresh Oxygen. We wanted you to see how waste products andexcess fluid is taken from the body. I hope you all enjoyed this journey into, through, andout the human body of Mr. Nod Binkins.ConclusionUntil next time, this is Jenni Kitchen signing off. Thank you for joining us here at theBiological News Network for this great journey through the digestion, circulatory, andurinary systems of the body.
JKitchen_HS120_unit9Assignment 7ReferencesThibodeau, G. and Patton, K., (2008). Structure and Function of the Body. St. Louis: MosbyElsevier.