The roots grow down towards the water and nutrients in the soil. the stem grows upwards towards the sun for energy
The islets of Langerhans are microorgans located in the pancreas.
<h3>The islets of Langerhans </h3>
The islets are formed by polygonal or rounded cells, arranged in cords, around which there is an abundant network of blood capillaries with fenestrated endothelial cells.
<h3>Types of islets of Langerhans</h3>
- Alpha (A) cells: secrete glucagon. In humans, these cells have regular-shaped granules containing a dense center surrounded by a clear region under the membrane.
- Beta (B) cells: secrete insulin and amylin. B cells have irregular granules with a center formed of irregular crystals of insulin complexed with zinc.
- Delta cells (D): synthesize somatostatin.
- PP (F) cells: contain a pancreatic polypeptide.
With this information, we can conclude that the islets of Langerhans are microorgans that constitute a large production of products for the maintenance of life.
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Answer:
A formation of a volcano
Explanation:
A natural event that can occur either over a few weeks or over a few million years is <u>a formation of a volcano</u>. Volcanoes are accumulated when magma from inside the Earth's uppermost mantle acts its approach to the surface. Near the covering, that explodes to form lava flows as well as ash sediments. Extra time as the volcano remains to emit, it will become more prominent.
