everything is connected in the human body. but i would have to say that the most is the respatory system because the blood carrys oxygen around and drops of CO2. Next possibly the diguestive. But all the systems are connected with little and big things.
Alveoli
Alveoli
The transition from an open circulatory system to a lymphatic system involves the movement of fluid and immune cells through vessels and lymph nodes. This ultimately connects to the closed circulatory system, responsible for transporting oxygen, nutrients, and waste products through the body. The closed circulatory system, also known as the blood circulatory system, uses the heart to pump blood through arteries, capillaries, and veins to maintain circulation.
The heart connects to the arteries and veins, to pass the blood through the body.
Mainly through hepatic portal vein which connects liver and small intestine
The pulmonary artery and the pulmonary vein.
closed circulatory system (double circulatory system)
They're both the circulatory system.
In a frog's circulatory system, the connection between arteries and veins is made through small blood vessels called capillaries. These capillaries allow for the exchange of oxygen and nutrients between the arteries and veins.
Amphibians have closed circulatory system Closed
The circulatory system
open circulatory systemclosed circulatory system.