In botany, a bulb is an organ that makes the storage of nutrients possible.
Coming from the Latin word bulbus , the word bulb gives its name to a biological root structure whose format resembles a blister . Botany presents it as a thick bud that is usually located in the underground portion of the plant and that stores reserve substances.
The bulb, therefore, is an organ that stores nutrients . It is formed when the base of the leaves becomes thicker and has five main parts: the basal disc (where the roots grow), the cataphylls (where nutrients are stored), the tunic (which protects the cataphylls), the stem (with the flower bud) and the lateral buds (which give rise to new bulbs).
Examples and types of bulbs
Among the bulbous plants, the onion , lily , tulip , garlic and leek stand out. It is possible to distinguish between tunicate bulbs (with superimposed layers surrounding the bases) and scaly bulbs (with imbricate bases).
However, it must be emphasized that in addition to these two types of bulbs in the field of botany, mention must also be made of the existence of a third typology. We are referring to the so-called solid bulbs , which are those that are identified by having a fleshy saucer, because their form of reproduction occurs through the fact that the bulblets grow at the base of the bulb, and by being wrapped in dry and thin sheets.
The term in anatomy
In anatomy , on the other hand, the part of the spinal cord that extends from the annular protuberance to the occipital recess of the cranial structure is known as the medulla oblongata . The bulb looks like a truncated cone with a lower tip and is responsible for sending impulses from the spinal cord to the brain, regulating the secretion of gastric juices, and controlling coughs and sneezes.
In the same way, we must also mention the existence of what is known as the olfactory bulb . This specifically is an organ that is located in the brain, exactly in its anterior part, and whose mission is to perceive various odors. To achieve this with complete success, it is based on a series of elements such as axons (extensions of neurons) and mitral cells.
The central group of stars that make up a spiral galaxy is called the galactic bulge.
galactic bulb
In the field of astronomy , the galactic bulge is the central group of stars that are part of spiral galaxies. These stars are distributed in space in an ellipsoidal manner.
In this field we have to highlight that there is basically a double typology of bulbs. Thus, first of all, we find the so-called classical bulges , which are those that are formed by stars that belong to the so-called Population II . Specifically, their main hallmark is the fact that they are part of the first generations of stars that were created after the Big Bang . And that is without forgetting that they are identified by being old, small and reddish.
Secondly, there are pseudobulbs that are cataloged as very similar to those that exist in spiral galaxies.
Electronics , finally, uses the term bulb to name the component that is used to amplify, switch or modify an electrical signal.