From my limited understanding - it is the kidney.
The most important part of the Circulatory Sytem is the capillaries.
Yes, capillaries are nearly everywhere in your body.
The stomach
Arteries,veins and capillaries are the blood vessels which help in transporting blood from one organ to another organ.
vein
yes capillaries are connected to heart because heart is a muscular organ and the exchange of materials between heart walls and blood occurs through capillaries.
The circulatory system - arteries, veins, capillaries.
continuous capillaries
Capillary
continuous capillaries
continuous capillaries
Arteries carry blood away from the heart and towards the capillaries. Capillaries are the smallest blood vessels.