The human body has two circulatory systems that essentially work together controlling the circulation of blood and lymph.
These are:
The Cardiovascular Systemconsists of blood, blood vessels and the heart. Blood carries oxygen, nutrients, hormones and antibodies to all parts of the body and removes waste products. The heart pumps blood through the vascular system (arteries, veins and capillaries) so that circulation is continuous .
The Lymphatic Systemstem is a network of lymphatic vessels, tissues and organs that contain specialized cells, the lymphocytes that help the body fight infections. The complex network of vessels draws and filters the fluid called "Lymph" from the body's tissues and transports it to the circulatory system through special entry points in the subclavian vein. The walls of lymphatic vessels are thinner than those of veins. Some are located near the surface of the skin while others travel through the deep fat tissue .
These two systems are responsible for maintaining homeostasis, the balance of fluids in the body. The lymphatic system is responsible for drawing water, proteins and other factors of cellular metabolism from the tissues and transporting them to the cardiovascular circulatory system .