- Lymph tissues include lymph nodes, lymph ducts, and lymph vessels. Organs of the
lymphatic system include the tonsils, thymus, and spleen. The lymphatic system works
with the cardiovascular system to return body fluids to the blood. The two systems
together are often called the body’s twocirculatory systems.
Review Questions
- Identify the main structures of the cardiovascular system.
- Identify three types of blood vessels found in the body.
- Which blood vessels bring blood away from the heart?
- What are the smallest blood vessels in the body called?
- What blood vessels bring blood back to the heart?
- Where does blood in the pulmonary system go once it leaves the heart?
- Where does blood in the systemic circulation go once it leaves the heart?
- What does blood that leaves the heart in the systemic circulation have that body cells
need? - Identify the main tissues and organs of the lymphatic system.
- Outline how the cardiovascular and the lymphatic systems work together.
- What is lymph, and where does it come from?
- Identify one function of tonsils.
- What might happen if a person did not have a spleen?
- Name the two circulatory systems of the body.
Further Reading / Supplemental Links
Vocabulary
arteries Blood vessels that carry blood away from the heart.
blood A body fluid that is a type of connective tissue; moves oxygen and other compounds
throughout the body.
capillaries The smallest and narrowest blood vessels in the body.
cardiovascular system The organ system that is made up of the heart, the blood vessels,
and the blood.
lymphatic system A network of vessels and tissues that carry a clear fluid calledlymph;
includes lymph nodes, lymph ducts, and lymph vessels.