In 3-5 complete sentences describe 2 human body systems - the organs and how they work together in the human body.

The cardiovascular system consists of the heart, blood vessels, and blood. The heart pumps oxygenated blood throughout the body via arteries, delivering oxygen and nutrients to tissues while collecting carbon dioxide and waste products, which are then transported back to the heart through veins. This system works in conjunction with the respiratory system, which includes the lungs and airways. The respiratory system facilitates the exchange of oxygen and carbon dioxide; when we inhale, oxygen is absorbed into the blood and carbon dioxide is expelled during exhalation, ensuring that the cardiovascular system maintains proper gas levels in the body.

Another vital system is the digestive system, which includes organs like the stomach, intestines, liver, and pancreas. This system breaks down food into nutrients that can be absorbed into the bloodstream, where the cardiovascular system then distributes these nutrients to the cells for energy, growth, and repair. Meanwhile, waste products from digestion are eliminated by the excretory system, which works to maintain the body's internal balance. Together, these systems highlight the interdependence of organs in maintaining overall health and homeostasis.