aswan's blog

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. Once blood has built up in the right ventricle it contracts, becoming systole while the atrioventricular valve (AV valve) closes as pressure is now greater in the ventricle than in the right atria. Once enough pressure has built up in the ventricle the semilunar, pulmonary valve opens, allowing blood to flow out of the ventricle and into arties that in the case of the right hear carry the blood to the pulmonary circuit where blood that lacks oxygenation is oxygenated. The left side of the heart follows a very similar process however it’s semilunar valve is called the aortic valve and blood is sent to the systemic circuit where organs use oxygen and nutrients from the oxygenated blood.

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. Once blood has built up in the right ventricle it contracts, becoming systole while the atrioventricular valve (AV valve) closes as pressure is now greater in the ventricle than in the right atria. Once enough pressure has built up in the ventricle the semilunar, pulmonary valve opens, allowing blood to flow out of the ventricle and into arties that in the case of the right hear carry the blood to the pulmonary circuit where blood that lacks oxygenation is oxygenated. The left side of the heart follows a very similar process however it’s semilunar valve is called the aortic valve and blood is sent to the systemic circuit where organs use oxygen and nutrients from the oxygenated blood.

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. Once blood has built up in the right ventricle it contracts, becoming systole while the atrioventricular valve (AV valve) closes as pressure is now greater in the ventricle than in the right atria. Once enough pressure has built up in the ventricle the semilunar, pulmonary valve opens, allowing blood to flow out of the ventricle and into arties that in the case of the right hear carry the blood to the pulmonary circuit where blood that lacks oxygenation is oxygenated. 

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. Once blood has built up in the right ventricle it contracts, becoming systole while the atrioventricular valve (AV valve) closes as pressure is now greater in the ventricle than in the right atria. Once enough pressure has built up in the ventricle the semilunar, pulmonary valve opens, allowing blood to flow out of the ventricle.

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. Once blood has built up in the right ventricle it contracts, becoming systole while the atrioventricular valve (AV valve) closes as pressure is now greater in the ventricle than in the right atria. 

As blood enters the right side of the heart it enters the right atrium where blood is able to flow without any additional help through the atrioventricular valve and into the ventricle. Eventually the atrium contracts (becomes systole however this term is usually only applied to the ventricle) forcing the rest of the blood still present in the atria into the ventricle. 

The likely mechanism controlling the interaction between fir and aspen trees is facilitative succession. This occurs to be the mechanism forwarding the secondary succession found in the example, as aspen tree density expansion allows for fir trees to be able to establish themselves within the environment. This is shown in Figure 2 as the figure shows the progression of the respective densities of the two trees in the context of the different successional stages. In Figure 2 it shows that aspen trees are able to establish themselves in meadows and in turn increase in density until aspen trees are able to grow and eventually overtake them density wise. Aspens allow for the conditions that that lead to fir population growth, thus showing the facilitative succession that is occurring. Figure 3 also shows that facilitation succession is occurring. In the experimental circumstances created by the scientists, aspen trees were thinned leading to mortality (or rate of death) for fir trees to increase drastically when compared to the control scenario. This demonstrates that without a significant aspen tree density, the mechanism of facilitation that allows for the fir to grow cannot occur.  The reduced aspen tree density is unable to support fir tree growth and survival as it typically would, leading to an increased rate of mortality for fir trees, thus indicating the mechanism that controls the interactions between firs and aspens.

The likely mechanism controlling the interaction between fir and aspen trees is facilitative succession. This occurs to be the mechanism forwarding the secondary succession found in the example, as aspen tree density expansion allows for fir trees to be able to establish themselves within the environment. This is shown in Figure 2 as the figure shows the progression of the respective densities of the two trees in the context of the different successional stages. In Figure 2 it shows that aspen trees are able to establish themselves in meadows and in turn increase in density until aspen trees are able to grow and eventually overtake them density wise. Aspens allow for the conditions that that lead to fir population growth, thus showing the facilitative succession that is occurring. Figure 3 also shows that facilitation succession is occurring. In the experimental circumstances created by the scientists, aspen trees were thinned leading to mortality (or rate of death) for fir trees to increase drastically when compared to the control scenario. This demonstrates that without a significant aspen tree density, the mechanism of facilitation that allows for the fir to grow cannot occur. 

The likely mechanism controlling the interaction between fir and aspen trees is facilitative succession. This occurs to be the mechanism forwarding the secondary succession found in the example, as aspen tree density expansion allows for fir trees to be able to establish themselves within the environment. This is shown in Figure 2 as the figure shows the progression of the respective densities of the two trees in the context of the different successional stages. In Figure 2 it shows that aspen trees are able to establish themselves in meadows and in turn increase in density until aspen trees are able to grow and eventually overtake them density wise. Aspens allow for the conditions that that lead to fir population growth, thus showing the facilitative succession that is occurring. Figure 3 also shows that facilitation succession is occurring. In the experimental circumstances created by the scientists, aspen trees were thinned leading to mortality (or rate of death) for fir trees to increase drastically when compared to the control scenario.