Parts of the System
These vessels carry blood back to the heart after it performs its tasks in the organs.
Veins
Blood collects these from digestion in the intestine.
Nutrients
These vessels carry blood away from the heart.
Arteries
When the heart does this, it allows blood to enter.
Expand
Blood begins its journey through the body when the heart pushes it into these.
Arteries
These vessels gradually get smaller as they spread through the body to reach all areas.
Blood vessels
This waste gas is released by blood in the alveoli.
Carbon dioxide
These carry blood back to the heart.
Veins
When the heart does this, it pushes blood out into the vessels.
Contract
Blood returns to the heart through which vessels?
Veins and capillaries
This system is described as a network that reaches every part of our body and allows blood and vital substances to flow.
Circulatory system
This gas is one of the waste products that blood collects from the organs before returning to the heart.
Carbon dioxide
These tiny vessels connect arteries and veins.
Capillaries
The heart pushes blood into these vessels connected to it.
Blood vessels (or arteries)
This is the place where blood takes oxygen from the respiratory system.
Alveoli
The circulatory system is formed by these three components.
Blood, blood vessels, and the heart
In the intestine, blood collects these products from the digestive system.
Nutrients
These vessels carry waste and carbon dioxide.
Veins
The heart’s function is compared to this mechanical device.
Pump
When blood reaches the organs, what does it flow through?
Capillaries
These walls contract to push blood into the arteries and expand to allow blood to enter.
Walls of the heart
Blood leaves (1)________ and (2)_________ in all organs which are vital for organ function. Blood collects (3)__________ from the organs.
1 and 2. oxygen and nutrients
3. waste
These vessels carry oxygen and nutrients to the organs.
Arteries
These surround the four cavities of the heart.
Muscular walls
What are the three functions that take place when the blood reaches the organs?
1. In the alveoli it takes oxygen from the respiratory system and releases carbon dioxide.
2. In the intestine it collects nutrients from the digestion of food in the digestive system.
3. In all organs, it leaves oxygen and nutrients that the organs need to work and it collects waste from the organs.