What do you think the structure of the abdominal cavity is like? Do you think it is a straight line or is it a curve? Maybe it’s a half moon shape or an oval shape. Well, if your anatomy professor has been teaching you about the abdominal cavity, he more than likely will say that it is a straight line from the top to the bottom.
Telling someone that the abdominal cavity is a straight line from top to bottom would be considered a mistake unless it’s coming from a medical professional. In fact, if you told a medical professional that the abdominal cavity was not straight, they might think you didn’t know what you were talking about and be very confused by your statement. The truth is that the abdominal cavity actually curves – its not straight at all.
The shape of the abdominal cavity that we have today have come about in many years of evolution and many changes to our bodies due to this evolution. In fact, during our evolution as humans, there was actually once a time when we had no abdominal cavities at all! In other words, we used to be fish! So how did this happen? Well, let’s take a look at when we lost our abdominal cavities.
The organs of the abdominal cavity, part of the digestive system, include the large and small intestines, stomach, liver, gallbladder, pancreas, spleen, and appendix. The abdominal cavity is a large space within the abdomen and contains most of the organs of digestion.
The abdominal cavity is surrounded by several layers of connective tissue. On the outside is a layer of loose connective tissue composed of fat and covered by skin. Inside are three layers: one of muscle (the external oblique), one of smooth muscle (the internal oblique), and one of connective tissue (the transverse). A sheet of peritoneum lines the inside of the abdominal cavity, separating it from other structures. This sheet does not cover all of the organs; for example, the stomach is covered only on the top and bottom edges by peritoneal folds called “ligaments.”
A Routine Abdominal X-ray…
Sorry intern, I’d like to do an abdominal x-ray on this patient. I was surprised to see that the radiographer was a man.
He said, “Well, it’s just a routine abdominal x-ray.” He spoke in a reassuring tone, like he did this every day. I looked at his gray hair and wrinkles and thought he didn’t look like he did this every day.
I asked him, “What kind of machine do you use?”
“Oh, we don’t use the machine for routine x-rays.”
“You don’t use the machine?”
“No. We have our own technique.”
“What kind of technique?” I asked.
“It’s a secret technique.” He smiled at me.
“Can I watch you do an x-ray?” I asked. “I’m an intern and I’ve never seen you do an x-ray before.”
He hesitated for a moment and then said, “Sure.” He seemed nervous about letting me watch him work but finally said yes when I asked again. We walked into the room together and he told me to sit down in the chair next to the patient. He ran his hand through his
I was reading an interesting book on how to draw human figures and then I noticed something. The artist had drawn muscles in red and tendons in blue. He also drew veins in blue. What a coincidence, I thought, because as a surgeon we are taught that veins are filled with blood and therefore they are red. I wondered if I could find out why this is the case.
As it turns out, arteries have high pressure flowing through them, and veins have low pressure; therefore arteries are thick walled, but veins have thin walls because of their low pressure. This is why when you cut yourself the bleeding is from the vein not the artery.
This makes sense, but why do surgeons learn that veins are filled with blood?
It turns out that veins contain blood because blood needs to be returned to the heart, so it’s more efficient to have it return along a vein than to have it take up space in an artery and get pumped back with each heartbeat.
More interestingly are the lymph vessels or lymphatics, which carry lymph and not blood. However, they aren’t blue like your veins; instead, they’re green like other body tissue such as muscle or skin. They’re green because they aren’t filled with blood, but rather with a clear
The escher art is a collection of different types of art that were made based on the artist’s imagination. This kind of art is becoming more popular nowadays and has become a trend. I personally like this type of art because I think it shows how creative and spontaneous a person can be in terms of artistic work.
This type of art is not always perfect because some drawings are hard to understand as you can see in the following picture:
But other pictures look really neat such as the following.
I personally like this picture because it is very realistic and looks like a real image of a human being. It also has high quality details that make it look more real. However, I am not sure whether or not it includes religious symbolism but nevertheless, it is an amazing picture that is worth seeing.
The escher art is a tessellation of the plane by regular pentagons. The name of Maurits Cornelis Escher is used to refer to the art made by him and those who follow his style and techniques.
The word “tessellation” comes from the Latin word “testa”, which means “tile”. When you have a pattern of repeating shapes, such as triangles, squares or hexagons placed over a plane, it’s called tessellation.
The escher art is also known as hyperbolic tiling. Hyperbolic tiling is a form of tiling that uses hyperbolic geometry, which unlike Euclidean geometry features two kinds of parallel lines: straight lines and circular arcs. In hyperbolic geometry, straight lines are curves rather than straight lines, because every line in the hyperbolic plane intersects itself.
The first use of an escher tile was in 1992 when M.C Escher was working on his final project which was a lithograph titled “Beyond Limits”. He was fascinated with this particular piece and went on to make more complex versions with tiles that interlocked in different ways.
