the tree is 24 years old. The inner part of the stem of the tree has a part referred to as cambium. Each year cambium produces high number of cells with thin cell walls when tree is highly active. These cells form the light-colored rings. When tree is less active cambium synthesizes few small cells with thick walls. The region occupied by these cells appear as a darker ring on the cross section of the stem. These two processes occur in the same year and as result each growth year is characterized by a ring consisting of a light and dark parts.
Valves in veins have an anatomic structure similar to semilunar valves of the heart
This is further explained below.
<h3>What are semilunar valves?</h3>
Generally, There are structures that look like pockets and are joined at the point where the pulmonary artery and the aorta exit the ventricles. These structures are called the semilunar valves.
The opening that connects the right ventricle to the pulmonary artery is protected by a valve called the pulmonary valve.
In conclusion, Vein valves have an anatomic structure that is comparable to that of the semilunar valves found in the heart.
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Answer:
A condition in which feces are discharged from the bowels frequently and in a liquid form.
Explanation:
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Answer:
I believe it's c I could be wrong but I'm pretty sure
