The metabolic activity of any tissue is limited by its blood supply; the more active any organ ... A second branch of the conus carries deoxygenated blood to posterior gills and the lungs from the ...

If you clench your hand into a fist, this is approximately the same size as your heart. It is located in the middle of the chest and slightly towards the left. The heart is a large muscular pump ...

If you clench your hand into a fist, this is approximately the same size as your heart. It is located in the middle of the chest and slightly towards the left. The heart is a large muscular pump ...