Which of the following species' organs most closely resemble those of a human?

Swine are often recognized for having organs that closely resemble those of humans, making them significant in both veterinary medicine and research. This similarity is particularly evident in the structure and function of several organs, including the heart, lungs, kidneys, and even the digestive system.

The anatomical and physiological likeness between swine and humans is largely attributed to genetic and developmental similarities. For example, the size and configuration of the organs in swine often allow for easier transplantation and surgical studies compared to other livestock species. This resemblance has led to pigs being used in organ transplantation research and as models for various human diseases.

In contrast, while other species like cattle, horses, and sheep have their own unique biological characteristics, their organs differ more significantly from human anatomy. This makes swine notably more applicable for studies in areas related to human health and disease than the other options listed. Thus, swine are an essential focus in scientific research and veterinary practices.