RE: Mental Challenge: Systemic Circulation!

[Chayliel]

So, due to the abhorrent behavior of trolls on this forum, my topic was unfortunately closed before I could come back and answer the question properly. For those who missed it, a recap:

 

"I'm bored, and I bet a whole lot of you out there are equally bored, which is obviously why you're here "surfing" this little challenge here, right? This is based upon college-level Human Anatomy and Physiology, so for all you would-be nursing/medicine majors out there, a head start! So, here's the low-down:

 

Describe the pathway blood would take, starting anywhere in the heart, flowing to the right foot, and back to where you started. For example, the first structure you name should be the part of the heart you started in, and the last structure should be the same exact place. Remember to name all vessels (arteries and veins) as well as the specific valves which the blood would pass through in the heart. Also note when you're anastomosing between arteries and veins, it's unnecessary to note transitions from arterioles or venules, just name major arteries and veins. Also remember to denote which side of the body the artery or vein is on. Good luck whoever feels luck taking this question on! I'll post the answer at around 2AM EST if I'm awake, if not, tomorrow maybe? I hope someone's gotten it by then! "

 

As such, here's the answer for anyone (I can imagine almost no one) who was in any way interested:

 

START: Left Atrium; Mitral Valve>Left ventricle>Aortic Valve>Ascending Aorta/Aortic Arch/Descending-Thoracic-Abdominal Aorta>Common iliac artery branch>Right common iliac artery>right external iliac artery>Right femoral artery>Right popliteal artery>Right anterior tibial artery/Right peroneal artery>Right dorsalis pedis artery/Right plantar arch artery>Anastomosis>Right plantar Venous arch/Right dorslais pedis vein>>>

 

Two options from there > Right great saphenous vein back to the right femoral vein area>>>

> Right tibial/peroneal veins>Right popliteal vein>Right femoral Vein>>>

 

Now, from the right femoral vein: >Right external iliac vein>Right common iliac vein>Inferior Vena Cava>Right Atrium>Tricuspid Valve>Right Ventricle>Pulmonic Valve>Pulmonary Trunk/Right and Left pulmonary arteries>Lungs>Right and Left inferior/superior pulmonary veins> END: Left Atrium.

 

Not that I had to, but I did promise an answer. Close this thread if you must! Good luck.

[das]

Oxygenated blood leaves the lungs and enters the Left Atrium (LA) of the heart via the pulmonary veins.

 

 

 

This oxygenated blood is then pumped from the Left Atrium (LA) of the heart to the Left Ventricle (LV) of the heart, and then out of the heart to the body tissues via the aorta, which is the major artery leaving the heart.

 

 

 

The aorta divides into other arteries that serve different parts of the body (as mentioned on the page about the

structure of the heart). These can be separated into two categories: blood supply to the upper-body, and blood supply to the lower-body.

 

 

 

Blood Supply to the Upper-Body:

The aorta leads to the subclavian arteries that take blood to the arms (some of which eventually reaches the hands),

and also to the carotid artery that carries blood to the head.

 

 

 

Blood Supply to the Lower-Body:

The aorta also leads to the hepatic artery that carries blood to the liver,

the mesenteric artery that carries blood to the small intestines,

the renal arteries that carry blood to the kidneys,

and the iliac arteries that carry blood to the legs (some of which eventually reaches the feet.).

 

Deoxygenated Blood

 

 

 

Blood is deoxygenated when it leaves the tissues and organs it has supplied with oxygen and other nutrients, to return back to the pulmonary circulatory system.

This can also be summarised for the upper-body and lower-body separately:

 

 

Return of Blood from the Upper-Body:

Blood returns from the head via the jugular veins, and from the arms via the subclavian veins. All of the blood in the major veins of the upper body flows into the superior vena cava, which returns the blood to the right ventricle of the heart.

 

 

 

Return of Blood from the Lower-Body:

Blood returns from the small intestines by passing through the hepatic portal vein to the liver.

Blood returns from the liver via the hepatic vein, from the kidneys via the renal veins, and from the legs via the iliac veins. All of the blood in the major veins of the lower body flows into the inferior vena cava, which returns the blood to the right ventricle of the heart.

 

 

After re-entering the (right atrium of the) heart via the superior vena cava and the inferior vena cava, deoxygenated blood is pumped into the right ventricle of the heart and then out of the heart to the lungs via the pulmonary artery.

 

 

 

Deoxygenated blood enters the lungs and is oxygenated before leaving the lungs (as oxygenated blood), and so the cycle begins again ...

 

 

 

 

right?

[Saru Inc]

i'm pretty sure you're not supposed to post your homework on this forum.

 

 

and I don't speak heart, so thats all gibberish to me.

[fastortoise]

...but the transition from venule to arterioles is the most important part :shame:

It's amusing knowing how inefficient we are at breathing compared to reptiles.

[Chayliel]

At least a few people took a little interest here. I find that it's good to have a relevant question around every once in a while. Not debate, not discussion, just a good Q&A. It keeps you on your toes. Hell, you might learn something in the process!

 

EDIT: To Das, I like the enthusiasm! However, I only needed the specific pathway blood would take going to, and from the right foot. Also, remember that the superior and inferior mesenteric veins supply into the hepatic portal vein.