Want this question answered?
they improved oxygenation of tissues
they improved oxygenation of tissues
The evolution of jaws is believed to be used originally for respiratory purposes. However, it is important to the history of vertebrates mainly because it allowed for more efficient eating.
The Circulatory System pumps blood and the Respiratory and Digestive System carry it though your body.
Because it allowed vertebrates to be free from needing to be near standing bodies of water where they could lay their eggs.
The trachea, or windpipe, is the bony tube that connects the nose and mouth to the lungs, and is an important part of the vertebrate respiratory system. hi so what is the trachea connected to
Well, it depends on the organism an the requirement. If you talk about lower organisms like poriferans they don't have circulatory system, respiratory system neither digestive system, simple diffusion occurs in their body as they do not need such system because of their environment and simplicity of development. If you consider flat worms (platyhelminthes) they have a low digestive system but lack any circulatory system as their cells are enogh close to the environment simple diffusion fulfills the respiratory requirement. The need, importance and significance increases with the complexity of an orgnism. As the man is most complex each system is really important. Without digestive system you can't make food simple,without respiratory system you can't yield energy, without circulatory system you can't supply energy or nutrients to the cells at distances. Hope you've got the answer of the question :)
Vascular system, also called the circulatory system. Look those terms up on wikipedia for more info.The answer to this is the circulatory system.The ciculatory system because the heart is in the ciculatory system and the blood is the most important thing in the circulatory system.Circulatory System
the circulatory system can be affected by something happening to something important in it such as the heart.that is one of the most important things in the circulatory system.
No lung . . no respiratory system.
The circulatory system is important because it moves blood through all parts of the body. It carries oxygen and nutrients to all parts of the body and removes carbon dioxide and other waste materials.
Diffusion spreads the blood cells and any other cells around in the body and gets enough to each organ so your body doesn't fail.