Which two body systems work together to transport hormones throughout the body?

The circulatory and endocrine systems work closely together to transport hormones throughout the body. The endocrine system is responsible for producing hormones, which are chemical messengers that regulate numerous physiological functions, such as metabolism, growth, and mood. Once these hormones are secreted into the bloodstream by various glands—such as the pituitary, thyroid, and adrenal glands—they travel through the circulatory system to reach their target organs and tissues.

This collaboration is vital for maintaining homeostasis, as hormones must be delivered quickly and effectively to influence various bodily functions. The circulatory system serves as the transportation network that ensures these hormones can reach distant sites within the body, allowing for timely physiological responses.

In contrast, other body system combinations proposed in the choices do not have the same direct role in hormone transportation. For instance, the nervous system primarily uses electrical signals to relay information rather than chemical hormones. The digestive and respiratory systems focus on nutrient absorption and gas exchange, respectively, while the muscular and skeletal systems relate to movement and support rather than hormonal transport.