These include the umbilical cord and the circulatory structures which are specialized for fetal circulation. Blood is pumped out of the ventricles. Observe the paired row of nipples on the ventral surface of … The atrium and ventricles are in separate chambers. Not really, just measure the effect of moderate exercise on your heart rate. Circulatory system. Another atrium and ventricle pumps oxygenated blood to the tissue; Respiratory system. The Digestive System This system is primarily located posterior to the diaphragm, the thin, sheet-like muscle dividing the abdominal cavity of the pig into two sections. #3- Digestive System #7- Nervous System #4- Circulatory System Materials: preserved fetal pig, dissecting pan, scissors, forceps, blunt probe, twine/string, safety goggles, one pair of disposable latex gloves per dissection day, tape measure. Mammalian hearts have four chambers (see Campbell, p. 42.4). The pig's trunk is divided into two regions: thorax (chest) and abdomen (stomach). There are only a few differences between the circulatory system of an adult pig and a fetal pig, besides from the umbilical arteries and vein. This allows blood to pass directly from the right to left atrium. Veins carry blood toward the heart. Observe that it contains three blood vessels: a large vein (blue) and two smaller arteries (red). Veins and Arteries on the Fetal Pig. Examine the umbilical cord. It is important that you do not break the vessels, since it is very difficult to determine the name of a vessel unless you can see where it comes from and where it goes. Fetal Pig: Circulatory System. As the fetal pig is dissected and studied, the structures identified should be compared with those of the human. Circulatory system. Pigs circulatory system. Diaphragm: a sheet of muscle and connective tissue that helps in breathing. The food to be digested enters the system through the mouth where it undergoes its initial process of digestion through chewing and mixing with The best way to view arteries is to carefully tease and pick the tissue surrounding the article with a dissecting pin. The circulatory system of a fetal pig is different fromthat of an adult pig because there is a shunt between the wall of the right and left atrium, which wouldallow blood to pass directly from the right atrium to the left. One atrium and ventricle pumps oxygen poor blood into the lungs. With the evolution of lungs in early tetrapods, a new and apparently more efficient circulatory system evolved. Arteries carry blood away from the heart. Two chambers of the heart, the atrium (or auricle) and ventricle, became increasingly important, and the beginnings of double circulation appeared. Air is drawn into the lungs and gas exchange takes place. Abdominal cavity: digestion & absorption. Dissection is not merely cutting the animal, but a An early stage in this evolution can be seen in amphibians today, where one of the main arteries from the heart (the … See this diagram for the fetal pig heart, and the Wikipedia Heart article for some good diagrams of human heart anatomy. There is a shunt between the wall of the right and left atrium called the foramen ovale. Other important body systems have significant differences from the adult pig. Neck Region: Using the diagram to the right begin your dissection in the neck region. Today you will learn how to take blood pressure. Digestive system Your pig may be filled with water and preservative, drain over the sink if necessary. Try to cut as little as possible. General Directions: All underlined words must be located on your pig and all numbered questions must be