(e)++Comparing+human+circulation+system+with+other+species

(10) The circulatory system has two main types of systems that work in the body of a living specie. They have divided into two types of circulatory systems; one is the open circulatory system and the closed circulatory system. This would we because animals have different body structure. The difference between the two open systems and the closed system is the blood transportations process. The Arthropods and most mollusks have the open circulatory system. The system’s process of getting blood around is different from the opened, the blood here is not pumped around the body, and the blood cells will be joining the interstitial fluid called “hemolymph”. This fluid will force the blood around the body into large sinuses. The closed circulatory system is found in the animals that have back bones, which are called the vertebrates. These animals have a way of getting blood around body different from other types of animals. The main thing around this system is that the blood is moved around using the pumped forces of the heart. So the heart will be beating and that will pump blooded around the body, getting the blood to transfer the oxygen/nutrient into body parts. Example of the closed circulatory system is the system in the earthworms, and I will show it in part 11-Worm. Some of the key features of the circulatory system is that the different between hearts of the animals. Each animal will have different heart structures there for, the blood and oxygen transport will be different. The main idea is that heart that have small pumps or single pumps will get oxygen around slower, on the other side, the hearts likes humans are created so it would have two pumps and it will get the oxygen faster and the body works harder. (11) __Amphibians __ The amphibians have closed circulatory system. They body will be getting blood that have been pumped by the heart. Heart of the frogs is different from other animals. In the heart of the frog, there is only lower chamber with a single ventricle. The frog will be working slower than humans since it only has on pump.

__Fish __ Fishes have the same circulatory system as the humans, they also have the closed system, this means that the blood is pumped using the muscle in the heart called ventricle. The heart, a folded continuous muscular tube with three or four sack like enlargements, undergoes rhythmic contractions, and receives venous blood in a sinus venosus.

__Humans __ Human circulatory system is the closed system. The blood will be pumped with two pumps in the one human heart. The heart is created to pump the blood to the lungs and get the oxygen then back to the body; after that the heart will pump the blood with new oxygen supply around the body. The oxygen gets around the body faster, so the humans are more active than the other animals in the list. The heart is more complex. __Insect __ Interesting thing about insects is that they don’t have veins to get blood around, but they still have a circulatory system. Their circulatory system is an open one. Their heart pumps the blood and it will be flowing freely around the body and will get to the needed body part. <span style="font-family: 'Arial','sans-serif';"> __<span style="font-family: 'Arial','sans-serif';">Worm __ <span style="font-family: 'Arial','sans-serif';">This warms have a closed circulatory system. The blood travels through the vessels in their body. <span style="font-family: 'Arial','sans-serif';">Their heart is formed from the aortic arches, there are five of them. Blood travels around the body, based on one pump in the heart, the pump is small, blood travels slowly meaning their body does not work fast.

<span style="font-family: 'Calibri','sans-serif'; font-size: 12pt;">Arrange them in order from simplest to most complex, when you present this information.

<span style="font-family: 'Arial Black',Gadget,sans-serif; font-size: 150%; margin: 0in 0in 0pt 0.25in; text-indent: -0.25in;">Circulatory System of All Vertebrates:

<span style="display: block; margin: 0in 0in 0pt 0.25in; mso-add-space: auto; mso-list: l1 level1 lfo1; text-align: left; text-indent: -0.25in;"> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 13pt; margin: 0in 0in 0pt 0.25in; text-indent: -0.25in;">The circulatory systems of all vertebrates, as well as of some types of worms and squid and octopus are closed, just as in humans. Still, the systems of fish, amphibians, reptiles, and birds show different stages of the evolution of the circulatory system. In fish, the system has only one circuit, with the blood being pumped through the capillaries of the gills and on to the capillaries of the body tissues. This is known as single cycle circulation. The heart of fish is therefore only a single pump, consisting of two chambers. In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps. Amphibians have a three-chambered heart. In reptiles, the ventricular septum, which is the wall between the two lower chambers (the right and left ventricle) of the heart, is incomplete and the pulmonary artery (arteries that carry deoxidized blood) is equipped with a sphincter muscle. A sphincter muscle is any muscle that is ring like, surrounding and being able to contract or close a bodily opening. This allows a second possible route of blood flow. Instead of blood flowing through the pulmonary artery to the lungs, the sphincter may be contracted to divert this blood flow through the incomplete ventricular septum into the left ventricle and out through the aorta. This means the blood flows from the capillaries to the heart and back to the capillaries instead of to the lungs.

This process is useful to cold-blooded animals in the regulation of their body temperature. Birds and mammals show complete separation of the heart into two pumps, for a total of four heart chambers; it is thought that the four-chambered heart of birds evolved independently from that of mammals. Circulatory systems are absent in some animals, including flatworms. Their body has no lining or fluid. Instead a muscular pharynx (these muscles aid in sucking in soil and food) leads to a widely branched digestive system that simplifies direct diffusion of nutrients to all cells. The flatworm's flattened body shape also restricts the distance of any cell from the digestive system or the exterior of the organism. Oxygen can diffuse from the surrounding water into the cells, and carbon dioxide can diffuse out. Consequently every cell is able to obtain nutrients, water and oxygen without the need of a transport system. So the circulatory systems of all vertebrates are different, varying between open and closed circulation, varying between having no circulation at all. The key idea in this is, a single chamber heart will be pumping less oxygen and blood, two chamber hearts will be pumping more, and three chamber hearts will be pumping the most oxygen and blood. The faster the circulation is going, the faster the subject will be getting blood and oxygen; this means that it can be more active. Species have developed over time; one would suggest that as evolution proceeds, species will eventually develop more chambers and better circulatory systems enabling them to be more active. As humans we have four chambers, meaning that as animals, we can be very active if chosen to be.