The left atrioventricular valve is structurally different from the aortic valve in the following ways.:
The Left atrioventricular valve is bicuspid valve while the Aortic valve is the semilunar valve.
The Left atrioventricular valve has irregular leaflets that regulate the opening and closing of the atrioventricular orifice, while the aortic valve has cusps like structure folded like half moon shaped structure.
Specialized supporting structures are needed to support the AV valve to the heart while the semilunar shape of aortic valve is self supportive.
Explanation:
Atrioventricular valves maintain the unidirectional flow of blood from atria to ventricles while the aortic valve maintains unidirectional flow of blood from left ventricle to the aorta.
Answer:
A - matter changes but no other substance is formed.
Explanation:
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. Therefore a change of matter is a physical change.
<span>Root hairs help a plant by soaking up water and nutrients from the soil and taking them up to the plant through the roots. Root hairs are cells at the tip of the root.</span>
If I am not wrong, I think you may have forgotten to add the rest of the question!
The statement that best describes a cost of coal mining on the region around the mines is that Its groundwater is contaminated.
<h3>What is coal mining?</h3>
A coal mine is a mine from which coal ore or coal minerals are mined.
Mining is activity of removing solid valuables from the earth or the activity that extracts or undermines.
Mining is a process that releases pollutants into the environment, therefore, the statement that best describes a cost of coal mining on the region around the mines is that Its groundwater is contaminated.
Learn more about mining at: brainly.com/question/14277327
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