Alrighty! It has been so long but I finally decided to write the last chapter to humans 101!

Thank you to everyone who has stuck with this story despite its many many *looks at calander* uhh years that it's been on haitus.

IMPORTANT NOTE: I will not be posting anymore on FanFiction, instead I've created an account on Archive of our Own under the same username where I will be posting any new fanfictions. I simply like the tagging system and the uploading system that AO3 has a lot more than FanFiction.

I am going to keep this account up but nothing new will be posted to it.

Thank you again to everyone who has followed, favorited, and commented, I read every comment, even if you think I don't, and I love and appreciate every single one!

Enough chit chat! Here is the last chapter to Humans 101: Body parts

"Last one in is a rusty bolt!"

Miko giggled, her feet smacking the hot concrete as she sped past Jack and dived headfirst into the pool.

"Hey, watch it! You'll crack your skull open like that!"

Raf chuckled at the teens from his spot under the umbrella. The sun had never agreed with his skin much so he was on cooler-watching duty. It wasn't that anyone was gonna take it, he just wanted an excuse to sit in the shade.

The day had started when they had discovered there was an old abandoned pool outside of town. Apparently no one really used it so the city abandoned it to cut down costs, and now the teens had claimed it as their own.

With a little help from the bots and a few strings pulled by Fowler, they managed to clean it and fill it with water in just half a day. Now they were having a pool day with the bots that weren't out scouting.

Smokescreen and Bumblebee sat next to the pool, occasionally dipping a hand in to create waves for the kids or to splash them.

Ratchet was officially in charge of watching all five of the children, and he chose to remain in vehicle mode next to Raf for the time being.

"Y'know you don't have to hide, there's no one nearby." Raf said, grabbing a soda out of the cooler.

"The reason I'm not in Bot-mode is because then I'd have to stand and my knee joints already hurt enough, but thank you all the same."

"Whatever makes you happy," he popped open the seal on the can and propped his feet on the table, sipping his drink.

Ratchet watched Raf's feet in their crossed position on the table.

"What in the pit are those?" He nearly shouted, startling Raf into spitting out his drink.

"What? What's wrong? Where?" Raf whipped his head around looking for the source of Ratchet's distress.

"Those thing on your peds, are they growths? Why didn't you say anything? Let me call Mrs. Darby and she can remove them right away."

Raf smacked his forehead, they had lived with the Autobots for so long he sometimes forgot the differences in their species.

"No, Ratchet, I'm fine. These are my toes, they're supposed to be there."

"Toes?" He spluttered, "what in Primus' name are they for? They look like worms or some kind of weird tumors."

Raf laughed and set his drink on the table, allowing him to grab a toe and examine it, "yeah, I guess they do look pretty weird compared to you guys. I look at them sometimes and think the same thing."

He spread his toes and wiggled them for emphasis.

"They are very important however, they help us keep our balance, they can be used to grip when climbing. Our feet aren't nearly as big as yours in proportion to our body, so we need them to balance us when we're walking, running, or even just standing."

"Doesn't make them any less weird to look at."

"No, it sure doesn't."

Ratchet stared at the oddities for awhile longer, when he noticed something

"Do you have claws...on your...toes?"

"Huh? You mean nails?"

"Whatever you want to call them. Do you attack other humans with your peds like you do with your servos?"

Oh Primus that was a terrifying thought. A human jumping onto another human latching onto them with their weird toes and fingers, clawing them with all four of their fleshy limbs.

"Uhhhh not that I've heard of. I actually learned recently that the reason we have nails is to support and protect our fingers and toes since there are a lot of nerves and blood vessels. Finger nails are the only ones that also are used to scratch and claw at stuff."

"Oh..." He paused for a moment, mulling over this new information.

"I noticed that Miko has different colored nails than you or Jack. Do the females of your

species have darker nails when they are younger? I noticed Mrs. Darby doesn't have them so I assume they change with age."

"No, she just likes to paint them. A lot of women do, and some men do it too. It's just a cosmetic thing. Kinda like getting tattoos, or piercings y'know?"

"Yes, Arcee told me everything Miko told her," he shuddered at the memory, "but she never mentioned painting nails."

"Yeah, well painting your nails is a temporary thing, they don't last very long before you have to repaint them. I don't know how long though, I'm not really into nail polish and stuff."

Ratchet hummed in response and decided not to ask any more questions for fear of discovering any more 'fun facts' that he'd rather not have learned.

Later as they were sitting and eating lunch, Ratchet was still thinking about what they had talked about. Despite his better judgment he was still wondering what other creepy things about humans he didn't know about.

He observed them as they ate their liquid melons, or whatever they were called. He kept watching the way that they ate and chewed, it was pretty much the way that Cybertronians ate.

They mostly drank their energon ever since the war had gotten so bad, it was much more efficient and they got the most nutrients out of it by liquidizing it.

They didn't have the luxury of fancy refined energons, whether in solid or liquid form.

He noticed that while they were very similar in their eating, their denta were slightly different.

Most Cybertronians had a solid strip of denta on their top and bottom jaw. Some had fangs, mostly Decepticons, but he had never seen denta like this.

They weren't sharp and pointy like sharkticons, or sparkeaters. They were square.

"Why are your denta shaped like that?"

"Excuse you, our what?" Miko mumbled through her mouthful of watermelon, spitting some on the table accidentally.

Despite being in vehicle mode, she could feel Ratchet glaring at her. She huffed and grabbed a napkin, wiping up the small mess.

"Your denta. Those things in your mouth you chew your food with."

"You mean teeth?"

"Okay, your 'teeth'. Why are they all...square?"

Miko looked at him, "seriously? You're teeth aren't exactly a mouthful of knives"

Ratchet gave an exasperated sigh, "I know that. What I mean is that yours are separated, normally creatures with separate denta have sharper teeth. Yours are flat like ours, but still separate. Why?"

"I dunno. I guess it makes it easier for the baby teeth to come out. It'd be pretty crazy losing all your teeth at once cause it's just one long strip."

"YOUR DENTA FALL OUT?!"

CRASH

Miko had jumped so hard when Ratchet shouted that she upset the table, spilling everything on the ground and nearly wacking Jack on the head with the umbrella when it fell.

"WHAT THE HECK, RATCHET?!"

She glared at him before bending down to start helping Raf and Jack pick up the table before trying to salvage what food they could.

"Give us some warning next time, geez!"

"I'm-I'm sorry, I didn't mean to scare you."

It only took a minute for them to fix everything back to the way it was, excluding some of the food that was tainted by the ground.

"Now," Miko turned to face the medic, "if you're done scaring the scrap out of us I can answer your question. So you didn't know that our teeth fall out when we're little?"

"Yes, that sounds like a terrible experience. Why do you do it?"

"It's not a choice, they fall out naturally. Ya see, when we're babies we don't got any teeth cause we might end up biting our mom accidentally or something. So we don't get them until we're a bit older. Then when we get to be around 6-ish, our baby teeth fall out little by little since they're too weak and small to last us when we're adults. But don't worry! We start growing our adult set of teeth right after, and that lasts us our whole lives."

"Don't forget wisdom teeth" Jack interjected around a mouthful of burger.

"Yeah, when we reach adulthood we get 4 extra teeth called wisdom teeth, but they usually need to be taken out. Fortunately none of us have our wisdom teeth yet so we're good!"

"Actually," Jack raised a finger. "Mine are just starting to come in, at least that's what the dentist told me last visit. I hope I don't need them taken out."

"Seriously? We might get to see you doped up?" Miko was practically glowing. "We're gonna get to see Jack doped up! I gotta have my camera ready, it is so going online."

"Don't you dare! I'm not letting you within ten miles of me if I have to have them taken out." Jack paused for a minute, "actually go ahead. But I get to film you when you get yours taken out."

"Yeah, well, I might not even need mine out."

"Well, I might not need mine out either."

"We'll see about that."

"And what's that supposed to mean?"

They continued bickering while Raf just sat back and watched them.

"Sometimes it's hard to believe that they're the oldest 'most responsible' ones, huh?"

Ratchet just sighed. "If I've learned anything today, it's that I'll never understand humans. Every time I think I've figured you out you just have to go and throw a wrench in the works and do something random or stupid."

Raf chuckled. "I feel ya," and returned to sipping his drink and watching the two teens bicker.