Answer:
4
Explanation:
The circulatory system includes the blood that has picked up the carbon dioxide from all of the respiring tissues and who also delivered oxygen to them to continue respiring.
The blood will then reach the lung where the carbon dioxide that the tissues released is exchanged for oxygen in the alveoli.
* Blood cells isn't an organ system which makes 1 incorrect.
* Digestive system will in no way bring the blood to the lungs or away from it. This is the circulatory system's job. So 2 is incorrect.
*Lastly, lungs are organs and the question asks for organ systems. So 3 is incorrect.
Some advantages and disadvantages of growing tall as a plant are as follow: Tall, Growing tall can lead to larger amounts of wind pressure on its stalk so it can not stand up easily. More birds and other flying insects will be driven to land on it and feed on it. It also has less protection from things around it. Some advantages are it will get sun easier, it will be able to spread its offspring easier and it will not get trampled. Some advantages and disadvantages of growing short are as follows: Short, Growing short can lead to less animals able to feed on your fruit and spread your seed. They can be trampled easier and move things tend to hide in its flourish of leaves. It gets eaten by more since it is easier to reach. Some advantages, it will not have very much wind blowing on it at all times, it has protection from other elements because it is close to the ground.
