can you explain the fetal pig circulatory system?
361214
I don't know as for pigs specifically but the circulatory systems of most mammals should be broadly similar - there will merely be small differences in the structure of the haemoglobin between individual species. The main differences between foetal and normal circulatory systems have to do with the placental route, as the position of the components of the vascular system will be the same as postnatal. The placenta is the organ which allows oxygen from the mother's blood to pass through into the foetal blood, and waste products such as CO2 to pass from the foetal blood back into the mother's blood. It has a good blood supply and is attached to the uterine wall. It will come out as afterbirth at the end of labour. \n\nSo, when the mother's blood flows into the placenta it is oxygenated. The maternal and foetal blood does not mix but comes into contact on either side of a thin membrane which is oxygen permeable. The only way that the foetus is able to grab the oxygen from the maternal blood is because it has a special kind of haemolglobin, foetal haemoglobin (HbF) with a higher affinity for oxygen than adult haemoglobin (you might see some oxygen dissociation curves on this - the normal line should be shifted to the left). It also has a lower affinity for CO2. Therefore the HgF is able to 'grab' oxygen and release CO2 to the maternal HgA (adult).\n\nOnce the HgF has become oxygenated in the placenta it travels through the umbilical cord (which has two separate blood vessels, one from foetus to placenta, and one from placenta to foetus) and into the foetal blood stream. The main difference once inside the foetus itself is that when the blood travels through the heart it goes through a hole between the right atrium and left atrium called the foramen ovale and (mostly) does not pass through the ventricles. This hole mostly closes up just before birth (ie in the last few weeks of pregnancy) but in some babies this process is incomplete, leading hole-in-the-heart syndrome. This hole only occurs because the greater pressure caused by pumping through the ventricles is not needed in the smaller body of the foetus. Apart from that, the rest of the foetal circulatory system is pretty much the same as the adult, just smaller (obviously).\n\nAfter birth, the gene coding for HgF will be switched off and the instead HgA will be produced, allowing for the new demands of respirating autonomously.\n\nI did a quick search to see if there was a useful website to help you. I cite this below. It has some nice diagrams.
443463
Fetal animals do not yet use their lungs.  The pulmonary arteries (which go to the lungs) are therefore not as well developed.
174310
i love loaded questions like this one... gets people thinking.... the fetus IS a person.  fetus and embryo are Latin words meaning young one and little one ... translation... BABY!  18 days after conception the heart begins beating... and if you ask me, if it has a beating heart it must be a life.  many people would be outraged if they saw someone cut dog or a cat into little pieces, yet those same people will deny that it is a baby even though the thing the abortionist removes has facial features, fingers and toes.  Good question.  if you would like more info on this topic please feel free to email me or contact me on messenger.
893925
Hi. Try this link : http://www.ynhh.org/cardiac/heart/index.html
437384
go on this website\n\nhttp://biology.kenyon.edu/heithausp/cat-tutorial/organs/welcome2.htm\n\nas it is all about cat anatomy,\n\nin simple terms though if you think of the anantomy of a human and turn it  180 degrees then you have a pretty good idea, the lungs are posterior the heart, i think i am ansewering the wrong queation, however this site would be a good source of information sorr i cant be more help good luck
136322
The cardiovascular system is a closed system, meaning that blood remains inside the vessels no matter how small they are.  The process of diffusion drives oxygen, carbon dioxide, wastes and nutrients between the tissues and the blood inside the blood vessels-blood just goes around the body.  Humans have a 4-chambered heart: 2 ventricles and 2 atria (sing: atrium).  The atria receive blood and the ventricles "expel" the blood (pumps the blood away from the heart).  You can partition the heart into two sides (left and right), each with its own ventricle and atrium.   One side is for the systemic circulation (to the body) and the other is for the pulmonary circulation (to the lungs).  Blood (deoxygenated) from the body collects in the right atrium, which passes the blood to the right ventricle, which relays the blood to the pulmonary arteries (arteries to the lungs) to get oxygen and expel carbon dioxide.  Once the blood in the lungs acquires oxygen, it passes to the pulmonary veins and into the left atrium.  Then, the blood goes into the left ventricle and is pumped into the aorta (think of it as the largest artery in the body or like in the water supply, the main tube of water where all of the other tubes originate). From the aorta it goes to the arteries and then to the arterioles and the capillary networks (where gas exchange occurs).  After being depleted of oxygen, it goes to the venules to the veins then to the vena cavae and back into the right atrium and it goes around again. :-)
348268
see this gonna be a little long but u will know it only if u read it, k? \n there are 4 chambers in the human heart. the upper chambers are called atrium n the lower are called ventricles. there is a vertical partition called septum. the blood enters into the right atrium through two tube like veins called inferior n superior venacava. these venacavae carry De-oxygenated blood from the whole body.this blood which is in the atrium then goes to the right ventricle during the contraction of the atrium. at the same time blood enters the left atrium from a tube called pulmonary vein which comes from the lungs carrying oxygenated blood. when the atria contract ,this blood enters the left ventricle. when the ventricles contract the DE-oxygenated blood from the rt ventricle is pumped into pulmonary artery which goes to the lungs for oxygenation; and the oxygenated blood from the left ventricle is pumped throughout the body through the systemic aorta.
656816
pigs are unguligrade, they walk on two digits\nHumans are plantigrade\n\nPigs have a spiral ascending colon\nHumans have a simple ascending colon\n\npigs have hoofed digits\nhumans don't\n\npigs have an os rostrum (bone in their nose)\nhumans don't\n\npigs have no nuchal ligament, incomplete bony orbit, tusks/ canines grow throughout life, no clavicles, and 14 teats\n\nhumans have nuchal ligament, complete bony orbit, brachydont teeth, clavicles and two teats\n\nI don't know much about human anatomy (only animal) this is all I could come up with off the top of my head
792266
The unborn fetus is completely dependent on the mother for all vital functions. The oxygen and nutrients ALL come from the umbilical cord by way of the placenta. Their is no oxygen in amniotic fluid for the baby.. The lungs are not inflated in the unborn fetus and although it may swallow amniotic fluid while in utero, it does not enter the lungs. The circulatory system is adapted to life within the uterus. Little blood flows through the pulmonary artery because of natural openings in the heart that close at birth or shortly after. When the umbilical cord is clamped, the lungs take on the function of breathing oxygen and removing carbon dioxide. The first breath helps to expand the collapsed lung but full expansion may take several days. Sometimes during birth a baby may aspirate some amniotic fluid it has swallowed into its lungs, usually not a problem unless the baby has passed meconium during labor .
622807
Pigs are known for carrying trichinosis. They can swim very well. They also keep themselves exceptionally clean.
348835
Humans have a closed circulatory system.  It is when the blood is contain in the veins and arteries.  Where the arteries take blood to the body and the veins take it directly back.  In an open system the heart pumps blood out into an open area where the blood just flows over the different body parts and then comes back to the heart on its own.  An open circulatory system is extremely inefficient and a lower form of evolution.
771570
You got me going over this, so I've been all over the world looking for an answer\n\nWhat is behind my belly button?\n\nAccording to the punch line of an old joke: "If you unscrew your belly button, your bottom falls off." In reality, the umbilical vein comes from the afterbirth or placenta, which carries blood enriched with oxygen and nutrients to the developing baby.\n\nThe umbilical vein runs from the navel to the fetal liver and through a bypass vessel (the ducted venosus) to the fetal heart. After birth, the umbilical vein remains open for a time, but soon afterwards it closes and shrivels up to become a fibrous cord. It crosses the abdominal cavity in a fold of the abdominal wall lining forming the round ligament (the ligamentum teres). Sometimes things don't close as they should and an umbilical hernia develops.\n\nmeaning\n\nOur belly button does not heal over because there is nothing between it and our stomach except a few thin layers of skin
43591
My very scientific answer would be that pig, cow and eye each have 3 letters.  \nB pIg cOw LOG eYe\n:-)
213159
http://www.bio.davidson.edu/courses/bio112/bio112labman/cppig.html
395359
oxygen molecule in lungs diffuses into the blood stream return to the heart via the pulmonary vein (the only vein to carry oxygenated blood) into the left atrium, left ventricle, through the aortic semilunar valve, through the ascending aorta, arch of the aorta, descending aorta, common illiac artery, external illiac artery, femoral artery... from there it  depends where in the hind leg... by the way these are human names, I don't know how many would be different for animals... my comparative anatomy teacher used to make us do these kinds of questions all the time ;-)
508
those other two are, in that the babies lungs are filled with embryonic fluid, but he isnt 'breathing' as we would thing of it. everything that the baby needs to live while in the mothers womb, is receieved through the umbilical cord, including oxygen.
182422
well it gives nourishment to the fetus.  it brings blood of the mother and fetus close together so there can be gas exchange and the fetus, basically giving it oxygen.  Also it bringsfood and water to the fetus along with taking away any metobolic waste that has been produced by the fetus