The main structures of the cirulatory system are: the heart, the arteries, veins and capillaries.
Bacteria do not have a circulatory system like humans. Instead, they rely on diffusion to transport nutrients and waste products across their cell membranes. This process is efficient for small, single-celled organisms without complex body structures.
Veins are the main structures of the circulatory system that carry blood containing carbon dioxide from the body back to the heart. The pulmonary veins are particularly responsible for carrying oxygenated blood from the lungs to the heart.
The most obvious answer would be the Circulatory system; however, the Lymph system also transports material throughout the body, it could be compared to the sewer system in a city. If this is for homework though, the right answer would most assuredly be Circulatory system.
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 digestive system and the respiratory system, or the lymphatic system and the endocrine system, or the digestive system and the cardiovascular system, or the endocrine system and the cardiovascular system
circulatory system
The major circulatory system structures are the heart, arteries, arterioles, capillaries and veins.
Circulatory System
heart arteries veins
Heart, veins, arteries, and capillaries
The circulatory system is composed of heart,arteries,veins and capillaries.
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Bacteria do not have a circulatory system like humans. Instead, they rely on diffusion to transport nutrients and waste products across their cell membranes. This process is efficient for small, single-celled organisms without complex body structures.
closed circulatory system (double circulatory system)
They're both the circulatory system.
Amphibians have closed circulatory system Closed
The circulatory system