A closed circulatory system
The circulatory fluid (I don't think its blood) and respiratory pigments circulate in vessels and never leave the vessels, much like that of humans and other mammals. This is in contrast to the circulatory system of insects, where the fluid (haemolymph) goes from the heart, through a vessel and then flows out to surround or 'bathe' the organs
human blood components
All bones have foramen in them. These are canals or openings through which nerves and blood vessels go.
Pulmonary arteries.
AOrta
Veins return, Arteries leave the heart.
Aorta.
The Aorta and the Vena Cava
The urinary and circulatory systems work together by the cells in your body dumping the wastes into your blood. Then the arteries carry the cleaned blood throughout the body. Meanwhile, the veins are carrying the uncleaned blood to the heart and the kidneys. In the kidneys there are blood filters where the blood flows through them and it is cleaned. Then there is a tube that carries urine from the kidney to the bladder. The bladder stores urine until it is ready to leave the body.
The capillaries are the site in the circulatory system where nutrients enter and wastes leave the tissues. The thin walls of the capillaries facilitate this diffusion.
Blood being pumped out of your circulatory system and into your chest cavity
Blood flows through veins to get to the heart. Arteries are blood vessels for the blood to leave the heart once it has been oxygenated.