The Digestive Tract of the Pig 1 J.
However, there is a correlation between a mother pig having a nutritious diet containing proteins, vitamins and minerals during gestation period and the survival rate of piglets.
The correlation, however, is not statistically different. Weight is also not a factor of survival rate because a healthier diet does not lead to a heavier offspring or a greater chance of live birth.
The efficiency at which nutrients are transferred dictates the health and growth of the fetus. FRP, or fetal weight: However, increasing FPR does not prove to increase litter size.
Instead, a more accurate way of determining fetus growth is through certain characteristics of the placental lining.
The width and length of the placenta folds are positively related and increase as gestation progresses. The width of the placental folds decreases until day 85 of gestation. From here, the width increases with gestation and is at its largest around day The rate at which these folds increase is negatively related to fetus size.
Thus, greater fold widths will be seen in smaller fetuses. Although increasing placental fold width does increase the interaction between fetus and mother, nutrient exchange is not most efficient in smaller fetal Digestive system of the pig, as would be expected.
Many other factors, including depth of placental folds, are also responsible for these interactions. Within hours of mating, the sperm and egg undergo fertilization in the oviduct and three days later the egg moves into the uterus. The cells begin to specialize by day six, and attach themselves to the uterus lining by day eleven.
From fertilization to day 18, the endodermectoderm and mesoderm have been forming inside the embryo, and are completely formed by day 18, the same day the placenta forms. The endoderm transforms into the lungs, trachea, thyroid gland, and digestive tract of the fetus. The ectoderm has a greater role in the development of the fetus.
It forms into the skin, nervous system, enamel of the teeth, lining of the intestine, mammary and sweat glands, hoofs, and hair. The mesoderm forms the major organ components that help keep the fetus alive.
It forms the muscles and connective tissues of the body, blood vessels and cells, the skeleton, kidneys, adrenal glands, heart, and the reproductive organs. By day 20, most of the major organs are visible, and the last half of gestation focuses greatly on increasing the size of the fetuses.
The first lymphatic organ to become present is the thymus. Lymphocyte builds up in the spleen on the 70th day. By day 77, the thymus is already completely developed and is distinguishable from other organs. Also, follicles are present on the tongue and intestines on day On the 84th day, Periarteriolar lymphoid sheaths appear in the fetal pig.
By this time, the liver and bone marrow are active and functional. Data from a study in by Nelson and Robinson showed that gilts from a small litter size ovulated more than the gilts from the larger litters.
The study suggests stress plays a role in impacting the reproduction. The amount of floor space has been shown to impact the time it takes gilts to reach puberty. An adequate amount of floor space allowed the higher percentage of gilts to reach puberty sooner than those gilts who had less floor space.
The gilts placed in smaller groups bore one more pig per litter than gilts in larger groups. Still, the environment in which the fetal gilt develops is significant to the reproductive and physiological development.
Brandon Anderson Preservation[ edit ] Fetal pigs are often preserved in formaldehyde [ citation needed ], a carcinogenic substance. A study found that exposure to formaldehyde could possibly cause nasal cancer in rats, leading to research on whether this was possible in humans or not.
Systems that are similar include the nervous, skeletalrespiratory neglecting the under developed diaphragmand muscular. Other important body systems have significant differences from the adult pig.
Circulatory system[ edit ] 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. There is a shunt between the wall of the right and left atrium called the foramen ovale.Welcome to the Whitman College Biology Department's Virtual Pig Dissection (VPD)!
This site is designed as a supplement to laboratory dissections exploring introductory mammalian anatomy and physiology — it is basic and many details have been omitted for clarity. - One of the final portions of the digestive system - Includes the anal canal, rectum, colon, and cecum - Takes care of absorbing any water left in the food that hasn't been digested yet, and then passing any unused waste from the body.
Learn pig quiz digestive system with free interactive flashcards. Choose from different sets of pig quiz digestive system flashcards on Quizlet. Digestive system» Academics» Departments and Programs» Biology» Virtual Pig» Digestive system.
Section Navigation Section Navigation / / Academics. Departments and Programs. Biology. Virtual Pig. Digestive system. Virtual Fetal Pig Dissection. Anatomical References. The pig’s digestive system starts with the oral cavity which consists of its tongue, the epiglottis, teeth and salivary glands.
The tongue helps roll the food into small pieces of food so the pig can digest it easier. The epiglottis stops food from entering the lungs through the trachea.
This is. The pig has a digestive system which is classified as monogastric or nonruminant. Humans also have this type of digestive system. They have one stomach (mono = one, gastric = stomach).
The monogastric differs from that of a polygastric or ruminant digestive system found in cattle and sheep. These.