是什么Difference Between Contractile Cell and Pacemaker Cell

Thekey differencebetween contractile cell and pacemaker cellis that contractile cells are involved in muscular contractions in the process of pumping blood, while pacemaker cells are involved in creating rhythmic impulses that set the pace for the heart during the blood pumping process.

The heart is a major organ that enables the functionality of the circulation system. It is important since it pumps blood, which is the main circulatory media throughout the body, providing sufficient oxygen and other important metabolites. The conduction and contraction system of the heart consists of different cells that work in parallel for efficient blood pumping. Contractile cells and pacemaker cells are two such cell types involved in the main functions of the heart.

内容

1.Overview and Key Difference
2.什么是收缩单元
3.What is a Pacemaker Cell
4.Similarities – Contractile Cell and Pacemaker Cell
5。Contractile Cell vs Pacemaker Cell in Tabular Form
6。Summary – Contractile Cell vs Pacemaker Cell

什么是收缩单元?

收缩单元or心肌细胞is the type of cell that makes up the contractile tissue, enabling the heart to function as a pump. These cells are responsible for ensuring sufficient oxygenated blood and essential代谢物to the required tissues to meet the needs of the body. It is said that each contractile cell beats over three billion times in a normal human lifespan. A highly specialized subcellular mechanism is present within the contractile cells to synchronize the contraction and effective pumping.

收缩单元s have an organized肉皮。这些肉瘤是条纹，其中带和光带的替代图案归因于收缩单元的排列。它包括两个主要蛋白质丝：肌动蛋白和肌球蛋白。这些是为收缩细胞执行心脏肌肉收缩的功能的活性物质。滑丝理论描述了收缩细胞引起的收缩力。

什么是起搏器单元？

起搏器细胞是负责在心脏中产生节奏脉冲的细胞，从而为血液泵送的速度设定了节奏。这些细胞直接控制心率。由于它们产生了节奏冲动，因此这些细胞构成心脏起搏器，这是心脏的天然起搏器。

SA node is the natural pacemaker of humans. The rhythmic impulse is the sinus rhythm. During damage to the SA node, the electrical conduction system of the heart gets disrupted. This will result in cardiac arrhythmias due to the loss of functionality of pacemaker cells. Cardiac arrhythmias cause a blockage in the heart, where blood will not be pumped normally. This will cause failure in other organs and could lead to death. In such instances, the AV node acts as the pacemaker. If the AV node also fails,Purkinje纤维将在短时间内管理心率。在此类事件中，天然起搏器被人工起搏器取代，该手术是一种模拟起搏器和起搏器细胞功能的设备。

What are the Similarities Between Contractile Cell and Pacemaker Cell?

• 收缩和起搏器细胞是两种类型的真核细胞。
• 他们是高度分化的细胞。
• They are present in the human heart.
• 此外，两种细胞类型都参与血液泵送的管理。
• 收缩和起搏器细胞基于电脉冲起作用。

是什么Difference Between Contractile Cell and Pacemaker Cell?

收缩单元s are involved in muscular contractions in the process of pumping blood, while pacemaker cells are involved in creating rhythmic impulses that set the pace for the heart during the blood pumping process. Thus, this is the key difference between contractile cell and pacemaker cell. Contractile cell is present in the contractile tissue, while pacemaker cell is present in the SA node and AV node. Moreover, contractile cell is characterized by the presence of sarcomeres, while pacemaker cell does not contain sarcomeres.

下面的信息图显示了与表格形式的收缩单元和起搏器单元之间的差异，以进行并排比较。

Summary – Contractile Cell vs Pacemaker Cell

The heart is a major organ that pumps blood throughout the body, providing sufficient oxygen and other important metabolites. Contractile cells and pacemaker cells are important in the overall functioning of the heart. Contractile cells are involved in muscular contractions in the process of pumping blood, while pacemaker cells are involved in creating rhythmic impulses that set the pace for the heart during the blood pumping process. So, this is the key difference between contractile cell and pacemaker cell.

Reference:

1.“”Contractile Cells。”An Overview | ScienceDirect Topics.
2. “Cardiac Muscle and Electrical Activity。”解剖生理学。新闻书籍。

Image Courtesy:

1.“”心肌细胞“ 经过OCAL (OpenClipart)– (CC0) via Commons Wikimedia
2. “无心脏的心脏传导系统“ 经过Madhero88 (original files); Angelito7 (this SVG version)(CC BY-SA 3.0)通过Commons Wikimedia