Gulp: Adventures on the Alimentary Canal

I can't recommend this book highly enough. Roach truly is the funniest, best science writer I've ever had the pleasure to read. Her inquisitive mind doesn't always follow a linear path & the side tracks are illuminating.--------------"While a seaman might survive the suction and swallow, his arrival in a sperm whale's stomach would seem to present a new set of problems."*[footnote]*I challenge you to find a more innocuous sentence containing the words sperm, suction, swallow, and any homophone of seaman. And then call me up on the homophone and read it to me.- Mary Roach in "Gulp: Adventures on the Alimentary Canal"Jonah got swallowed by a big fish? The above quote is in the part of the book discussing that. The good news is that whales have a fore stomach with no digestive juices. The bad news is that it is like a gizzard on some birds & crushes the food into manageable sizes. Sharks will also swallow prey whole, but their stomachs do have digestive juices & they do digest living prey as three sea turtles found out to their detriment.---------Yes, much of the book was about gross stuff, but it was seriously interesting. We're basically an evolved digestive system. The alimentary canal is the core of the man-beast. It creates our energy & all the rest of the body is simply a way to spread the wealth & get a return investment to feed it more efficiently. We rely on (live for?) our gut & the sales pitch we're subjected to daily is full of misinformation & outright lies.You think I go too far? The first third of the book is devoted to what we eat & why. Smell & taste are not processed by the frontal lobes of our brain. Did you know that people who lose their sense of taste & smell can actually starve to death because they can't swallow? It's that important.Our body's sensors can get screwed up & we can develop bad habits, but it's often good to give in to a craving. I never thought much of food restrictions & never subscribed to any fad diets, thankfully. I always try to eat a fairly balanced diet of what I want & apparently that's pretty much a good thing since everything is working well & I've been the same weight since I was 20. Maybe liver tastes yucky to me because I shouldn't eat it. Yeah, I'm going with that.Why do some diets work for some people & not for others? Apparently, each gut is as unique as a fingerprint. By the amount & types of bacteria in it, your family could be traced since Momma seeds yours. What you digest & how is also covered to some extent. This isn't a dietary book, though. There are no clear cut answers to the individual, but there is a lot of overall knowledge.I never knew how much misinformation was floating about. The chewing fad of the early 1900's was disproved a century or more (Roach gives dates, I just have a bad memory.) before it was suggested & even implemented in some cases by our government, basically at the behest of a well connected con man. But that's just one of many cases she discusses throughout the book. Many are still in play today.The stomach is amazingly ductile, but people can blow it up. Interestingly enough, it's never happened to a competitive eater. There are several sections devoted to this wondrous organ & its abilities. Really interesting chapters devoted to comparing what it can digest & how fast it moves food along, too.The small intestine gathers most of good stuff out of what we swallow and the colon gets a little more plus the water, but it does some important digestion of its own. I was a little disappointed that there wasn't anything about the gall bladder, but my wife's problems with that organ taught us that it isn't considered part of the digestive system, even though bile is very important in the process. Be warned. Your stomach doctor might scope you through both ends, but they don't do gall bladders at all. It's like the step child of the digestive system. They just tell you to take Maalox & ignore it after that.She also explores the similarities & differences between our digestive system & that of herbivores a bit. I didn't know that rats & rabbits processed their food for many vitamins in their colon (B's & K). Process, but not absorb. Whoops! This is why they HAVE to eat their own poop. (Bunnies suddenly aren't nearly as cute, are they?) They're severely stunted if diapered. More illuminating are the comparisons between us, gorillas (vegetarians) & monkeys.Probiotics? The overwhelming majority are just marketing. The bacteria you need most are anaerobic (can't live in an oxygen environment) so you won't find them in a yogurt cup nor will they survive the trip through the stomach. There is a way to restore them, but neither the insurance nor pharmaceutical companies are happy with it. You probably won't be either, unless you're suffering from severe colon problems & changing your own diapers a dozen times a day. Two words: Fecal Transplant. It often works, too.There are a couple of chapters devoted to farts. Gross! Yeah, but figuring out what makes them stop smelling would sure be nice, wouldn't it? I've been in a couple of elevators that I barely made it out of with my lunch intact. So some people study them, even make synthetic farts. Eating charcoal doesn't help - it's absorbancy is used up way before it gets to the colon where the smelly gases are generated. So just how do they deodorize them? Well, Beano DOES help with beans, but they've worked out some other ways, too. Unfortunately, no one will read about them in normal magazine ads. Those publications say the yuck factor is too strong. You can find out about them in this book, though.There's another quote in the book about the anus being a marvel of engineering beyond man's technical ability in that it is able to handle gas, liquids, & solids on command with aplomb. (Usually, hopefully!) So calling someone an a*hole is really talking them up!This has gotten way too long, sorry. It's fascinating & I only touched a few of the high points. There's a lot of excellent knowledge here & only Roach's delicate touch could make it so readable, even at lunch time, about the only time I have to read during the spring.I'd also like to tip my hat to Ed, Mary's husband. You're a lucky man, but you must have a great sense of humor & the hide of a rhino. Seriously, she explores whether or not he can kill her in the night with beer farts if she sleeps with her head under the covers! That's almost as bad as his trip to England in Bonk: The Curious Coupling of Science and Sex where he got to spoon with Mary while a doctor used a sonogram to see how things fit together during coitus. Ed, you're a better man than I!;-)

Gulp. Adventures on The Alimentary Canal By Mary Roach Though author Roach was recently called "America's funniest science writer" (Washington Post) she is not a scientist and claims that she often times has to fake her way through interviews with the experts. This alone was enough of an endorsement to get my attention, yet I've read her work before and pretty much knew what I was in for. Or did I? Though author Roach starts off with a non-alimentary canal location (the nose) it's quickly explained that it is through the process of smell that we eat what we do, not necessarily because of how it tastes. Eighty to Ninety percent, to be exact. And on she travels, down our inner tubing, splashing next into the stomach. Since mine is on the sensitive side, I paid close attention to this particular chapter, before moving on down. "...stomachs can digest themselves. Gastric acid and pepsin digest the cells of the stomach's protective layer quite effectively...the organ swiftly rebuilds what it breaks down. A healthy adult has a new stomach lining every three days." Food for thought indeed.The author offers tons of interesting facts, figures and things to consider, here are just a few; Laundry detergent is essentially a digestive tract in a box, fecal transplants can cure intractable C. diff infection, internal cleansings are very unhealthy, humans secrete two types of saliva--stimulated and un-stimulated and Elvis did not die of an overdose. I'm not telling, you'll have to read this baby to find out the truth.Over the years, as you can well imagine, many, in the name of science, came up with all sorts of reasons why and how the body digested food and ways to help the process along. Take Horace Fletcher, the nut-case who instigated a famous fad for extreme over-chewing called Fletcherizing. He suggested that the best and most efficient way to get the biggest buck from every bite was to chew one's food until it was completely liquefied. Talk about long lunches!Then author Roach researched the famous surgeon William Beaumont's case proving once and for all how little chewing is needed to digest most foods completely. It was done under rather unsavory conditions, but makes for some fascinating after-lunch reading. Trust me, read it after.She also delves into stuffing yourself for a living, using the lower intestine to transport items, nose-picking frequency and the history of flatulence research (you won't believe the ending). "If things go as they should, the bacteria hysteria so lucratively nurtured by the likes of Purell and Lysol will begin to subside." According to Roach, Bacteria is what keeps our system literally chugging along, without it, well, things that should move on and out (think grown children) can turn into all sorts of discomforts. She does hop around a great deal and touches on pet food science for some bizarre reason, but overall this is a hilarious as well as informing read. "Most of us pass our lives never once laying eyes on our organs, the most precious and amazing things we own. Until something goes wrong, we barely give them thought."This book will give you much to chew on.

My f@vourite living author! Once again a superb book that delves into the science of the gut in an accessible way. My only criticism is that it can be a little American centric for European readers but those of us who haven’t studied science at university this is an easy access course!

In the hand of Mary Roach, the alimentary canal functions and working are explained in good and engaging manner. Well done Mary.

Roach's books are fascinating: they delve into things most people would consider gross or unpleasant, and make the subject interesting and actually fascinating. They are also well written, which helps enormously. Gulp looks at your gut: what happens when you eat, what's in your stomach and intestines, what happens when things go wrong, and all kinds of similar subjects related to digestion. Not the sort of thing you think would be interesting? Give her a chance...once you start reading, you'll be hooked.Of all her books (and I've read them all) this is perhaps the most entertaining, partly because of the subject matter but also because of the approach. As someone with medical training, none of this was new to me, but it was still a fascinating approach to the subject, written in a way non-medical people will find both informative and readable, and highly accurate, too. There's the science of the digestive system, of course, but woven around that is the story of people and various other detours (such as religion) and how they tie back to the gut.This is a fun read: despite the subject making some people squeamish, you can't help but be drawn into the subject and enjoy the writing. I guarantee you'll learn something; I guarantee you'll be telling others some of the things you learn here; and I guarantee you'll get a giggle out of some of the content. Well written, well researched, and addictive. What more can you ask from a book and a writer.

This book told me many things about a part of the body that is important to our health and often causes us amusement. She wrote it with this in mind -- informative and amusing. I love it when non medicos or non scientists or non historians manage to tackle subjects like this and do so with insights from their areas of endeavour -- egs are this author, Bill Bryson (who explained almost everything in science) and Aritha van Herk, a novelist who wrote a history of Alberta (Mavericks). I am looking forward to reading Mary Roach's Stiff. She is a delight.

Mary Roach has written another wonderful book about a unique aspect of being a human being, and made it deeply interesting as well. I learned more than I thought possible about saliva, and maybe more than I wanted to about poop...but it was never too scientific or gross, just fascinating. I thought the cover photo reminded me of the Rolling Stones logo, which was an extra treat.