It's because a process called gas exchange has taken place in the fish's body. Oxygenated blood is pumped throughout the body, and the cells in the body take out oxygen and put in carbon dioxide (gas exchange). The blood returning to the heart of the fish is deoxygenated, and it will have to eventually go to the gills. There, the carbon dioxide (CO2) will get dumped into the water and oxygen (O2) will be picked up from the water at the same time in another gas exchange.
Respratory systen
Yes, blood flows into the heart via veins. Blood flows away from the heart in aryteries.
Blood flows to the lungs through the pulmonary trunks which divides into the right and left pulmonary arteries. These transport blood to the air sacs of the lungs, where carbon dioxide in unloaded and oxygen is picked up. Then the blood flows back to the heart by the pulmonary veins.
The blood flows from the veins into the vena cava (inferior and superior) then into the right atrium. The right side of the heart sends the blood to the lungs to exchange carbon dioxide for oxygen.
Different amounts of oxygen alter its color due to the high levels of iron in the hemoglobin. Coming from the lung region, blood is extremely oxygen-rich, making it a brighter red. When the oxygen is stripped away the blood turns blue.
Blood with no oxygen (the blood that flows to the heart picks up oxygen from the lungs).
Artery: Vessels whereby Blood flows from the heart to the lungs & rest of organs and body (rich in oxygen). Vein: Vessels whereby Blood flows from organs and body to the heart (low in oxygen).
After taking oxygen from the lungs the blood travels to the left atrium of the heart. From here the blood is pumped to the left ventricle. The left ventricle then pumps the oxygenated blood into the aorta through which it flows to the rest of the body.
Respratory systen
Air fills lungs, heart pumps non-oxygenated blood to the lungs via arteries where it becomes oxygenated flows back to the heart and flows through the body .....
The heart pumps blood, so that the blood continuously flows throughout the body. Blood contains oxygen, which organs need to survive; if they were deprived of oxygen, they would die. When one's heart stops or they lose a lot of blood, they may die due to the lack of oxygen their organs and tissues need.
Oxygen-rich blood is transported in arteries and oxygen-poor blood is transported in veins, which are distinct collections of blood vessels and never meet. The oxygen in oxygen-rich blood diffuses through cell walls and powers the metabolism of cells, leaving oxygen poor blood behind to be collected by veins and transported to the heart and lungs for reoxygenation.
The blood flowing through the veins carry the carbon dioxide from the cells of all parts of the body to the heart. Hence we say that the veins transmit the De-oxygenated blood from all parts of the body to the heart. The De-oxygenated blood collected in the heart flows to the lungs through the pulmonary artery. The blood gets oxygenated in the lungs. Then the oxygenated blood flows to the heart through the pulmonary vein. Then the oxygenated blood flows to all parts of the body through the arteries. So blood flows into the heart through the veins, and flows out of the heart through the arteries. Normally the De-oxygenated blood flows through the veins and the oxygenated blood flows through the artery. The only exceptions are the pulmonary artery that transmits de-oxygenated blood from heart to the lungs and the pulmonary vein that transmits oxygenated blood from lungs to heart. This is because blood flows into the heart by veins and flows out of the heart by arteries.
Our heart pumps blood around our body because... when we breath in oxygen it travels down our windpipe and into our lungs where it flows into our blood stream which the heart pumps round and to our muscles with are supplied with the oxygen which it needs to keep going! few, its a long story!
Yes, blood flows into the heart via veins. Blood flows away from the heart in aryteries.
Connective tissue flows through the heart and blood vessels.
A vein tranfers clean blood from the heart through the whole body and since clean blood carries oxygen it helps transfer oxygen through the whole body too! ~Allyssa!