medulla

简明释义

英[meˈdʌlə]美[mɪˈdʌlə]

n. 髓质

的缩写

复 数 m e d u l l a s 或 m e d u l l a e

英英释义

单词用法

同义词

反义词

例句

1.During development period, there were cystoid thymic corpuscles and interdigitating cells in thymic medulla and cortico-medullary border.

在各发育期中华鳖胸腺皮质、髓质交界处和髓质区有明显的囊状胸腺小体和交错突细胞。

2.The medulla blood supply is easier affectable under the pathological circumstances.

在病理情况下，髓质血供具有更大的易损性。

3.We read a letter about the medulla spinalis of some quadrupeds.

我们读了一封关于一些四足动物的髓质脊髓的信。

4.Those groups penetrate into the medulla and become corresponding groups of internal arteries.

外部动脉穿入脑实质延续为内部相应的各群动脉。

5.The periodic discharge activity was recorded from ventral root c4 or c5 and the neurons of medulla of the preparation.

在此标本上记录到了颈4,5脊神经腹根及延髓神经元的节律性放电活动。

6.There is a central vein in the center of the medulla.

髓质中央有一大的静脉，称中央静脉。

7.The brainstem includes the medulla, which controls vital functions like breathing and heart rate.

脑干包括髓质，它控制着呼吸和心率等重要功能。

8.In a medical study, researchers focused on the effects of stroke on the medulla.

在一项医学研究中，研究人员关注中风对髓质的影响。

9.Damage to the medulla can result in severe consequences, including loss of autonomic functions.

对髓质的损伤可能导致严重后果，包括自主功能丧失。

10.The medulla plays a crucial role in transmitting signals between the brain and spinal cord.

髓质在大脑和脊髓之间传递信号方面起着至关重要的作用。

11.During the exam, we learned that the medulla is responsible for reflex actions such as swallowing.

在考试中，我们了解到髓质负责如吞咽等反射动作。

作文

The human body is a complex system composed of various organs and tissues, each with its own unique functions. One crucial component of the nervous system is the brain, which is divided into several parts, including the cerebrum, cerebellum, and the brainstem. Within the brainstem lies the medulla, an essential structure that plays a vital role in regulating many involuntary functions necessary for survival. The medulla oblongata, often simply referred to as the medulla, is responsible for controlling functions such as breathing, heart rate, and blood pressure. These processes are automatic, meaning they occur without conscious thought, allowing us to focus on other tasks while our bodies maintain homeostasis.The medulla serves as a critical communication center between the brain and the spinal cord. It contains important neural pathways that transmit signals to and from various parts of the body. For instance, when we inhale, the medulla detects changes in carbon dioxide and oxygen levels in the blood. In response, it sends signals to the diaphragm and intercostal muscles to adjust our breathing rate accordingly. This regulation is crucial for ensuring that our bodies receive adequate oxygen while expelling carbon dioxide effectively.In addition to its respiratory functions, the medulla also plays a significant role in cardiovascular control. It receives input from various sensory receptors throughout the body that monitor blood pressure and heart rate. If blood pressure drops too low, the medulla can initiate a response to increase heart rate and constrict blood vessels, helping to restore normal blood pressure levels.Furthermore, the medulla is involved in reflex actions, such as swallowing, coughing, and vomiting. These reflexes are essential for protecting the airway and digestive tract from harmful substances. For example, when food enters the throat, the medulla triggers the swallowing reflex, coordinating the muscles involved in this process to prevent choking.Despite its small size, the medulla holds immense importance in maintaining life-sustaining functions. Damage to this area of the brain can lead to severe consequences, including respiratory failure, irregular heartbeats, and even death. Understanding the medulla and its functions helps us appreciate the intricate workings of the human body and the delicate balance required for health and survival.In conclusion, the medulla is an integral part of the brainstem that oversees many involuntary functions critical for our survival. Its ability to regulate breathing, heart rate, and blood pressure, along with its involvement in reflex actions, underscores its significance in our daily lives. As we continue to study the brain and its various components, the medulla remains a fascinating subject of research, revealing more about how our bodies function and adapt to changing environments.

人体是一个复杂的系统，由各种器官和组织组成，每个部分都有其独特的功能。神经系统的一个关键组成部分是大脑，它分为几个部分，包括大脑、大脑小脑和脑干。在脑干内，有一个重要的结构——延髓，它在调节许多生存所需的非自愿功能中发挥着至关重要的作用。延髓（通常简称为延髓）负责控制呼吸、心率和血压等功能。这些过程是自动的，意味着它们在没有意识思考的情况下发生，使我们能够专注于其他任务，同时我们的身体维持着体内平衡。延髓作为大脑和脊髓之间的重要通信中心，包含重要的神经通路，传递信号到身体的各个部分。例如，当我们吸气时，延髓会检测到血液中二氧化碳和氧气水平的变化。作为回应，它向膈肌和肋间肌发送信号，适当地调整我们的呼吸频率。这种调节对于确保我们的身体获得足够的氧气并有效排出二氧化碳至关重要。除了呼吸功能外，延髓还在心血管控制中发挥着重要作用。它接收来自身体各个感受器的输入，这些感受器监测血压和心率。如果血压过低，延髓可以启动响应，以增加心率并收缩血管，帮助恢复正常的血压水平。此外，延髓还参与反射动作，例如吞咽、咳嗽和呕吐。这些反射对于保护气道和消化道免受有害物质的侵害至关重要。例如，当食物进入喉咙时，延髓触发吞咽反射，协调参与该过程的肌肉以防止窒息。尽管其体积较小，但延髓在维持生命所需功能方面具有巨大的重要性。对这一大脑区域的损伤可能导致严重后果，包括呼吸衰竭、心律不齐甚至死亡。理解延髓及其功能有助于我们认识到人体的复杂运作以及健康和生存所需的微妙平衡。总之，延髓是脑干的重要组成部分，负责监督许多对我们生存至关重要的非自愿功能。它调节呼吸、心率和血压的能力，以及参与反射动作，突显了它在我们日常生活中的重要性。随着我们继续研究大脑及其各个组成部分，延髓仍然是一个引人入胜的研究课题，揭示了更多关于我们身体如何运作和适应变化环境的信息。