Describe why the circulation in humans is called double circulation?
We know that same blood passes two times through the heart i.e. 1) blood from heart to the lungs and 2) lungs to the heart for circulation in body. That's why circulation of blood in human beings is called double circulation.
In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation. This is necessary for optimum oxygen utilization as humans are warm blooded animals and need extra energy to maintain their body temperature
double circulation means blood flows through the heart twice. first circulation is completed when deoxygenated blood is brought to heart and is further pumped to lung for oxygenation. the second circulation pathway is from lungs to heart and then back to the body. so double circulation is important as it helps in oxygenation of blood.
Double circulation allows for a pressure increase after gas exchange occurs. In single circulation, the blood goes from the heart to the gill capillaries. Since these are so thin the starting pressure must be low so the capillary membranes don't leak. This causes less perfusion of gases into the tissues after the blood leaves the gills. Evolution solved this problem through double circulation, which began with lungfish. They have a partially divided heart which seperates…
Is this is serious question..... the same why any other horse would, whether they're stabled/field kept/wild they all get oxygen the same way. They breathe it in(nose). Basically the same way we do. Basically by breathing. However humans have a double circulation system, and I think horse (like fish) only have a single circulation system. Not 100% sure about that bit though.
Why is a bush or tree a more accurate than a line to describe how hominids developed into modern humans?
The fetal circulation is the circulatory system of a human fetus, often encompassing the entire fetoplacental circulation that also includes the umbilical cord and the blood vessels within the placenta that carry fetal blood. The fetal circulation works differently from that of born humans, mainly because the lungs are not in use: the fetus obtains oxygen and nutrients from the mother through the placenta and the umbilical cord.
The importance is equal as all the other heart parts. See below: The right ventricle pumps blood into the pulmonary circulation (very important) and the left ventricle pumps blood into the systemic circulation through the aorta(also vital, very important) From Wikipedia: In a four-chambered heart, such as that in humans, there are two ventricles: the right ventricle pumps blood into the pulmonary circulation to/for the lungs, and the left ventricle pumps blood into the systemic…
The"zoonosis" is not so much a "disease" itself specifically, but more a term used to describe lots of different diseases that normally make animals sick, but can make humans sick too. They are transferred, in one way or another, from animals to humans, or the opposite, from humans to animals, and this is sometimes called "reverse zoonosis". The animals carrying the diseases can be wild or domesticated animals, and the infection can be air-born or…