This is the sacrum!
The sacrum is a big, shield-shaped bony structure at the bottom of the spine. It's connected to the pelvic bone on either side, so it helps to stabilize and strengthen the entire pelvis. From the outside, it's the hard part of your lower back, just above the butt crack.
Clumps of overgrown cells lining the colonA sexually transmitted infection (STI) in the anusInflamed veins in the rectum or anusCysts on the skin of the butt due to infected hair follicles
Hemorrhoids are inflamed, swollen veins in the rectum and anus!
Hemorrhoids located inside the lower rectum are called internal hemorrhoids, while those around the anus are called external hemorrhoids. Symptoms include pain, itching, and bloody stool. Causes range from straining during bowel movements, chronic diarrhea, and increased pressure from pregnancy. Hemorrhoids are a common problem and are usually treated with lifestyle changes or creams. Make sure to see your doc if you have any of those symptoms!
GracillisGluteus maximusButtocks tendon fasciaePatella
This is the gluteus maximus!
The gluteus maximus is the main outer muscle in the butt, so it forms the shape of your booty! It starts at the tailbone and attaches to the femur and other bones in the leg. It allows the hip joint to extend so the thigh can rotate. You use it to stand up, do squats, climb stairs, and dance...or twerk.
This is true!
It's one of the strongest muscles in the body, too. The gluteus maximus allows us to stand up and sit down, and also keeps the body stable when you're standing erect for long periods of time — so it's really important!
Lumbar radialisCoccyxAn extra lumbar vertebrae meant for a tail that only some people are born withGluteus bone
This is the coccyx!
The coccyx, also called the tailbone, is a small triangular bone made up of three to five partially fused vertebrae located under the sacrum. The coccyx is attached to muscles, tendons, and ligaments in the butt and helps to stabilize your body when you are in a sitting position. You can actually break the coccyx if you fall too hard on your butt, so be careful out there!
Small intestine --> colon --> anus --> rectumRectum --> small intestine --> colon --> anusColon --> small intestine --> anus --> rectumSmall intestine --> colon --> rectum --> anus
Poop travels from the small intestine to the colon, then to the rectum, and then it exits from the anus.
Food first travels through the small intestine where it's broken down by enzymes so that nutrients can be absorbed. This leaves behind a combination of water, electrolytes, and waste products — aka poop. The poop is then pushed through the large intestine (colon) by waves of muscular movement into the rectum, which stretches and expands — creating the sensation of needing to poop. Finally, poop exits the body through the anus, which relaxes as the rectum contracts, to push it out. If this process goes too fast, it can result in diarrhea. If it goes too slow, you might feel constipated.
Adductor longusHip extensorRadialisGluteus medius
This is the gluteus medius!
The gluteus medius muscles makes up the outer, back region of the thighs, above either side of the butt. They help to rotate the thighs, moving them out and away from the body, while also providing support to the pelvis. These muscles also keep the pelvis from dropping while walking.
People fart 13 to 21 times on average each day!
Yes, people actually fart that much, on average, in one day! It happens when there's gas in the digestive tract, which gets there one of two ways: We swallow air or carbonation while eating, and if it doesn't leave the stomach by burping, it goes into the intestines and exits the body as a fart; another culprit is bacteria in the large intestine breaking down undigested carbohydrates, which releases gas and comes out as a fart. Either way, farting is pretty normal.
Yes, you can get melanoma on your butt even if it's never been exposed to sunlight.No, you can't get melanoma on your butt if it's never been exposed to sunlight.
Yes, you can get melanoma on your butt!
You can definitely get melanoma on your buttcheeks, even if they've never seen the light of day. It's actually more common than you might think, because people tend to overlook the skin of the butt when they check for skin irregularities or suspicious moles. So don't forget to pay attention to your butt! Here's a skin self-exam from the American Cancer Society to get you started. If you're concerned about skin cancer, visit your doctor to get a screening.
How Much Do You Actually Know About Butts?
Guess the booty isn't your best subject. But don't get too bummed, nobody's perfect! We hope you at least learned a thing or two from taking this quiz — keep studying and you won't fall so far behind!
You keep studying — your butt knowledge will grow in no time!
Give yourself a pat on the back (or butt!). When it comes to butts, you pretty much know it all — from bones and muscles to digestion and disease, and everything in between. We hope you put that butt expertise to use!
Anatomical information sourced in part from:
• The Princeton Review Anatomy Coloring Workbook, 3rd Edition, I. Edward Alcamo, PhD, Pengiun Random House 2012.
• The Medline Plus Information Database of The National Institute of Health (NIH) and US National Library of Medicine.