Three leaflets make up the aortic valve. They open to allow blood to move from the left ventricle of your heart to the aorta. The largest blood vessel in your body is the aorta.
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What are aortic valve?</h3>
Although there is some confusion in their designation, the aortic valve typically has three cusps.
They might be referred to as the non-coronary, left, and right coronary cusps. Additionally, some publications suggest calling them the left, right, and posterior cusps.
The aortic valve is the biggest of the four heart valves. This crucial valve regulates the flow of blood into the aorta, the major artery of the heart, from the left ventricle.
Therefore, aortic valve between the left ventricle and the opening of the blood vessel.
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Answer:
Coevolution
Explanation:
When two or more organisms each evolve in response to each other, we call it coevolution.
The best explanation as to why water forms beads on leaves with waxy cuticles would be the strong intermolecular forces between water molecules. The correct option would be C.
There are 2 types of molecular forces:
- Adhesive force: forces between molecules of different substances
- Cohesive force: forces between molecules of the same substance.
When the cohesive force between molecules is greater than the adhesive force, the molecules will cling more to themselves than to the molecules of different substance.
In other words, water forms beads on waxy surface of leaves because the cohesive force holding the water molecules together is stronger than the adhesive force between the water molecules and the waxy surface of the leaves.
More on molecular forces can be found here: brainly.com/question/14365107
the plasma membrane and inside the cell
Hibernation helps animals survive the changing seasons. Foods that bears eat, such as berries and flowers, are much less available during cold winter months. When they hibernate, bears enter a deep sleep. ... While they sleep, the bears can survive because their bodies live off of their stored fat or food.
During hibernation, the animal’s body temperature, heart rate and breathing rate all drop to significantly lower levels. Animals do this to survive the winter because the weather is cold and food is scarce. It is advantageous because these animals can quite literally shut themselves off for weeks at a time rather than try and survive through harsh weather conditions.
While many people think bears are hibernators, they actually participate in a similar, though not exact, practice. Instead of hibernating, bears fall into a deep sleep called torpor. During torpor, heart rate and breathing rate decreases, body temperature reduces slightly and bears do not eat or release bodily waste. Bears can sleep more than 100 days without eating, drinking, or passing waste!
Bears sleep in dens that they make themselves, as well as in hollow trees, caves and dens built by other bears. A den can be built in 3–7 days, however, the timing of den building varies from bear to bear. While some bears build their dens months before hibernation season, others choose to excavate their dens.
These animals can dramatically drop their body temperature to below freezing—salty body fluids work to prevent tissue crystallization in particularly cold temperatures.
So really, animals that are true hibernators don’t actually sleep through the entire winter.
The urea produced by their fat metabolism is broken down and the nitrogen is re-used by the bear to rebuild protein.
