What can internal parasites do to a horse's intestines?

• A. They nourish the intestines
• B. They can damage blood vessels and intestines
• C. They cause the horse to become more agile
• D. They prevent calorie absorption

Answer: (B)

Internal parasites can have significant detrimental effects on a horse's intestines. They can damage both the blood vessels and the intestinal wall, leading to a range of health issues. This damage can disrupt the normal function of the intestines, impair nutrient absorption, and may result in inflammation or even infection. As these parasites feed on the horse's blood or tissue, they can lead to conditions such as colic, weight loss, and anemia, ultimately compromising the horse's overall health and well-being.

While some options might suggest alternative roles that parasites could play, they do not reflect the harmful reality of how these organisms interact with a horse's body. For instance, internal parasites certainly do not nourish the intestines; rather, they exploit the host, leading to a decline in health.