Magic School Bus

The Magic School Bus is an edutainment multimedia franchise that consists of a book series, a TV series, and several video games among other things. Each of the stories within the franchise centers on the antics of a fictional elementary school teacher, Ms. Frizzle, and her class, who board a "magic school bus", which takes them on field trips to impossible locations, such as the solar system, clouds, the past, and inside the human body.

For the purposes of this wiki, this page will cover all media, including picture books, chapter books, and the animated series.

Magic Schoolbus Inside the Human Body (Picture Book)
After Ms. Frizzle teaches her class about the human body, she has the class purposefully ditch Arnold, shrinks them and the bus, except Arnold, who swallows them unwittingly. This gives Cole and Degen a chance for two parallel stories, inside and outside of Arnold. With the bus inside, Cole explains digestion from the stomach into the small intestine. Then the bus enters a blood vessel where readers can see the plasma and red and white blood cells and they flow into the heart. From there the class, now out of the bus and garbed in operating room smocks and masks, flow with the red blood cells, now with fresh oxygen, to the brain. They climb down the bones of the spine, follow nerves to see muscles work, and then finally catch up with the bus to emerge into the nasal cavity. Meanwhile on part of the facing page, Arnold has coped with being lost and alone and has made it back to the school. With an enormous sneeze, he sends the bus out to join him in the parking lot. The class can now chart the body from actual experience.

Predator

 * Arnold Perlstein

Prey

 * Mrs Frizzle
 * Mrs Frizzle's entire class

For Lunch (Season 1, Episode 2)
In the opening scene, Arnold is seen chewing gum, trying to break the school's gum chewing record, and anticipating to win two free tickets to a ride called Action Mountain, the ride of Wanda's dreams. She slaps him on the back, but then realises that this careless action resulted in Arnold accidentally swallowing the gum. Ms. Frizzle announces a field trip, Wanda is once again thrilled, while Arnold falls into further dismay.

As the class boards the bus, an anxious Arnold states that he is very uncomfortable after inadvertently ruining Wanda's day and fears that he could accidentally ruin the day of the entire class. Ms. Frizzle decides to allow him to volunteer out of the field trip, much to Arnold's surprise, with Liz as his substitute teacher. He contentedly agrees, yet he develops a suspicion due to the fact that Ms. Frizzle has never actually allowed this before.

As Arnold turns away, opening a bag of Cheezie Weezies for a snack, what he does not know is that the bus has ambiguously shrunk in size and is heading his way. The tiny bus, blending perfectly in with the Cheezie Weezies, is consumed by Arnold without knowing it in a handful. Ms. Frizzle then drives across his tongue, where the class observes "the pink pavement," "dripping walls," and the "humongo white things," but are all disgusted upon realizing that they are in a person's mouth. They become even more stunned when Ms. Frizzle presents them with a digestive diagram, revealing that the body that they are entering is Arnold's. After eating the Cheezie Weezies, Arnold heads back to the classroom but has feeling of emptiness in the classroom. Unaware of the class's location, he grimly states that now he is no longer an obstacle for them anymore. He notices a jar of olives, picks one out, and chews it, still not knowing that the class is observing the first step of digestion right in his mouth (grinding food into smaller particles). Swallowing the olive, he takes the bus along with it.

The bus is brought down Arnold's throat and into his esophagus (which automatically pushes the bus down through it) and out into his stomach. While it begins sailing on the surface of the stomach acids and food particles in there, Arnold has already finished consuming the entire jar of olives, thinking of a plan to break the school's olive eating record and reclaiming Wanda's respect. His hope is short-lived when Liz tosses the school's record book to him, showing that the highest record was 978 olives - too long a way to go.

The bus transforms into a submarine and enters Arnold's small intestine, along with the food remnants and the undigested gum, an object in which Ms. Frizzle states is too tough to be broken down. Inside the small intestine, the students observes countless numbers of "rubber cactus-like things" called villi, via scuba diving in Arnold's digestive juices. While Carlos wonders where the nutrition is redirected from it, the film jumps to yet another cut scene. Dorothy Ann narrates that after nutrients are sucked out of the digestive tract, they are sent into the blood stream, which then transports the nutrients system wide. The scene cuts back to the class realizing the function of the villi, but their attention is disrupted after Wanda gets separated from the class and caught on the gum that is rolling away.

In the classroom, Arnold fails again at another attempt to break a school record by napping, waking up two minutes and four seconds short. He fails to see how he can break this record if his stomach keeps waking him up. As the class tries to rescue Wanda, they exit Arnold's small intestine and up in the large intestine, where the atmosphere possesses a dry, but rather, odorous environment. As they move on in search of Wanda, food particles surrounding them grow drier and drier as they progress deeper. When they finally catch up with Wanda, she and the gum are both hanging precariously on a ledge. Struggling to keep her balance, Wanda loses her balance and falls off, but is saved after one of her feet attaches to a strand, which acts like a bungee cord, and propels her back up and into the bus where Carlos grabs her and pulls her back into the bus. However, due to the class' misunderstanding, she is not in peril, but rather enjoying a treacherous "thrill ride" through Arnold's digestive system.

When Ms. Frizzle states that the trip is not over yet, Ralphie becomes frustrated, reciting all the organs of the digestive system consecutively and asking what's left to go through. Ms. Frizzle answers that they just need to "join the rest of the waste products and finish the trip." With the shocked and disgusted class refusing to exit through Arnold's anus as feces and end up in the toilet, they plan to exit out of him by going back the way they came.

Outside, a seemingly hungry Arnold is anxiously digging out of a locker, stating his inability to break the lunch eating record when he is unable to find lunch. However, reaching into Ralphie's lunch, he manages to obtain a Chocolate Mallow Blaster with delight.

Meanwhile, Ms. Frizzle's class is busily propelling against the digestive cycle, but they are troubled after realizing the difficulty of departing from the stomach. While they are frustrated, Arnold is also in a state of unease; he knows that breaking the lunch eating record will help him regain Wanda's respect for him, but he will also anger Ralphie by stealing his lunch. Suddenly, a slow, misty voice speaks his name the instance he is about to take a bite of Ralphie's Mallow Blaster. The voice, disguised as his "conscience", is actually Wanda speaking on the bus microphone. She then coaxes Arnold into drinking the bottle of seltzer in her lunch, which makes him hesitate at first and become suspicious of his "conscience". Wanda, on a short fuse, snaps at him to just drink her seltzer, and seeking this as another opportunity to break a school record, he does so after telling Liz to time him.

When the seltzer enters Arnold's stomach, the class begins rocking the bus back and forth to create a giant gas bubble in the content. One forms, which carries the bus afloat and up the esophagus. Arnold loudly belches, without knowing that the bus is propelled out of his mouth by the force. He is yet again disappointed when Liz tells him that he failed to break the seltzer drinking record. His disappointment is interrupted when the class and Ms. Frizzle return to the classroom, carrying a tray of lunch for him.

While Arnold eats a hearty meal, Wanda presents him with a trophy for "breaking the record for being the best field trip ever". When Arnold asks the class where they went, they tell him that they had literally gone inside him. Unsettled at this, Arnold declares that in the future, he'll always participate in all future field trips. But his courage is once again thwarted upon realizing his next destination, while the class laughs out loud.

Predator

 * Arnold Perlstein

Prey

 * Mrs Frizzle
 * Mrs Frizzle's entire class

Inside Ralphie (Season 1, Episode 3)
It's Broadcast Day and the class is counting on Ralphie to help them come up with an idea for the two hours of live television they're doing. The trouble is that he's sick, so his mother, Dr. Tennelli, won't let him go to school. So she calls Ms. Frizzle to tell her he won't be able to come.

When Ms. Frizzle says that there is an amazing battle going on inside him, the class decides Broadcast Day should be about whatever is making him sick. They go back to the bus, making him believe they are leaving him. It later returns as a shrunken helicopter through his window. Ms. Frizzle tells him to say, "Ahh!," and it enters his mouth, approaching his red and swollen vocal cords, but he coughs, sending it flying out. Afterwards, it enters via a cut on his leg. It travels up his bloodstream to his throat. While watching a video of his bloodstream, he notice that the blood inside is clear rather than red and that the cells and red and white blood cells and the jagged cells are called platelets, which help the body heal scrapes and cuts. Meanwhile, Dr. Tennelli returns and notices the television. She remarks that the stuff on it is "remarkably realistic".

As the bus enters the throat tissue, the students attempt to do the report. Ralphie and his mother watch this on television and notice that bacteria is destroying his throat cells, making him sick. Just then, the white blood cells come around and eat it. Unfortunately, it multiplies and begins chasing the students. Dr. Tennelli then turns off the television and tells Ralphie that the best cure for a bacterial infection is complete rest. As she leaves, Liz turns it back on and the inside story continues, where the medicine Dr. Tennelli gave Ralphie earlier destroys the bacteria. The white blood cells also see the bus as a threat since it's covered with antibodies and attempt to devour it. The others call for help, but Ralphie doesn't notice since he's sound asleep. The bus barely manages to escape from the white blood cells' grip and ride off, with the white blood cells chasing after it. They make it to Ralphie's throat and he wakes up just in time to listen to the report on television. The bus travels up his nose and Liz causes him to sneeze it out by sprinkling black pepper in his face. The students, still small, are now back in his room and interview him. They tell him that his body is built to keep out things such as germs, his throat is sore due to his body sending extra blood there to fight off the infection, and the white blood cells almost ate the bus because his body thought it was bacteria. They also tell him that his body was doing all this to protect him. As he finally goes to bed, the other students hop on the bus and leave through the window.

Predator

 * Ralphie Tennelli

Prey

 * Mrs Frizzle
 * Mrs Frizzle's entire class

The Magic School Bus Gets Eaten (Season 1, Episode 4; later a picture book)
Mrs Frizzle's class goes to the ocean, and talk about the food chain, beginning with phytoplankton, goes to zooplankton, then anchovies, then they get swallowed alive by a Tuna.

Predator

 * Random Tuna

Prey

 * Mrs Frizzle's entire class

Works out (Season 3, Episode 9)
At a Teacherathelon, Mrs Frizzle gets the hiccups, and Ralphie advises her to hold her breath to get rid of them. She complies, and she ends up losing the race. Mrs Frizzle tells him that her muscles gave out because of the lack of oxygen, and when Ralphie asks her why, she takes her own class on a field trip in her respiratory and muscular system by inhaling them through her nose.

Predator

 * Mrs Frizzle

Prey

 * Mrs Frizzle's entire class