Final answer:
Systemic venules contain deoxygenated blood that returns to the heart after circulating through the body and exchanging oxygen for carbon dioxide.
Step-by-step explanation:
The type of blood found in the systemic venules is deoxygenated. In the body's circulatory system, systemic circulation is responsible for carrying blood between the heart and the rest of the body. Oxygenated blood leaves the left ventricle of the heart and is distributed throughout the body via the systemic arteries. As the blood gives up its oxygen to the body's tissues, it collects carbon dioxide and becomes deoxygenated. This deoxygenated blood is then returned to the heart through the systemic veins, which include venules and larger veins like the inferior vena cava.