Organ System Integration

The circulatory system in fetal pigs acts as the mode of transportation for the endocrine system. The endocrine system uses hormones to target specific organs to promote the growth and development in pigs, and these hormones are secreted into the bloodstream, where they are then carried around the body via the circulatory system to where in the body they are designed for. For example, the hormone Pregnant Mare's-serum Gonadotropin (PMSG), which is secreted by the chorion into the bloodstream, promotes the development of a fertile oestrus cycle in fetal pigs. The circulatory system also carries vital oxygen via red blood cells and other nutrients throughout the body that is also needed in the growth of fetal pigs. The circulatory and endocrine systems work together to promote the growth of fetal pigs.