I need so much help with A Visual Experience Through the Respiratory System :( please its super long?

You begin your exploration of the nasal cavity in the right nostril. One of the first things you notice is that the chamber is very warm and humid. High above, you see three large, round lobes, the ___(1)___ which provide a large mucosal surface area for warming and moistening the entering air. As you walk toward the rear of this chamber, you see a large lumpy mass of lymphatic tissue, the ___(2)___ in the ____(3)____, or first portion of the pharynx. As you peer down the pharynx, you realize that it will be next to impossible to maintain your footing during the next part of your journey. It is nearly straight down, and the ___(4)___ secretions are like grease. You sit down and dig your heels in to get started, After a quick slide, you land abruptly on one of a pair of flat, sheetlike structures that begin to vibrate rapidly, bouncing you up and down helplessly. You are also conscious of a rhythmic hum during the jostling, and you realize that you have landed on a ____(5)____. You pick yourself up and look over the superior edge of the ___(6)___ down into the seemingly endless esophagus behind. You chastise yourself for not remembering that the ___(7)___ and respiratory pathways seperate at this point. Hanging directly over your head is the leaflike ____(8)___- cartilage. Normally, you would not have been able to get this far because it would have closed off this portion of the respiratory tract. With your host sedated, however, that protective reflex does not work.

You carefully begin to pick your way down, using the cartilages as steps. When you reach the next respiratory organ, the ____(9)____, your descent becomes much easier, because the structure's C-shaped cartilages form a ladderlike supporting structure. As you climb down the cartilages, your face is stroked rhythmically by soft cellular extensions, or ____(10)_____. You remember that their function is to move mucus laden with becteria or dust and other debris toward the ___(11)___

You finally reach a point where the descending passageway splits into two ____(12)____, and because you want to control your progress (rather than slide downward), you choose the more horizontal _____(13)____ branch. If you remain in the superior portion of the lungs, your return trip will be less difficult because the passageways will be more horizontal than steeply vertical. The passageways get smaller and smalller, slowing your progress. As you are squeezing into one of the smallest of the respiratory passageways, a ___(14)___, you see a bright spherical chamber ahead. You scramble into this ___(15)___, pick lumps of a substance that looks suspiciously like coal, reminding you that your host is a smoker. As you stand there, a soft rustling wind seems to flow in and out of the chamber.press your face against the transparent chamber wall and see disclike cells, __(16)__ passing by in the capillaries on the other side. As you watch, they change from a somewhat bluish color to a bright ___(17)____ color as they pick up ___(18)____ and unload ___(19)___. You record your observations and then contact headquarters to let them kno you are ready to begin you ascent. You begin your return trek, slipping and sliding as you travel. By the time you reach the inferior edge ofthe trachea you are ready for a short break. As you rest on the mucosa you begin to notice that the air is becoming close and very heavy. You pick yourself up quickly and begin to scramble up the trachea. Suddenly and without warning, you are hit by a huge wad of mucus and catapulted upward and out onto your host's freshly pressed handkerchief! Your host has assisted your exit with a ___(20___