Difference Between Bowman’s Capsule and Glomerulus

Key Difference – Bowman’s Capsulevs肾小球

肾单位是肾。It consists of a renal corpuscle and renal tubule. The renal corpuscle is the component that filters blood in the nephron of the kidney. The renal corpuscle is made up of a tuft ofcapillariesknown as glomerulus and a capsule which is collectively known as Bowman’s capsule. Bowman’s capsule is a membranous double-walled capsule which surrounds the glomerulus of the nephron. The glomerulus consists ofendothelial cells。这y are a cluster of capillaries situated at the beginning of the nephron. Based on their location in the nephron, two types of nephrons can be identified. In皮质肾单位，肾小球位于renal cortex. Injuxtamedullary肾元，肾小球位于renal medulla。这key differencebetween Bowman’s capsule and glomerulus is,鲍曼（Bowman）的胶囊是围绕肾单位肾小球的双壁胶囊，而肾小球是肾单位的小血毛细血管簇。

内容

1.Overview and Key Difference
2.什么是鲍曼的胶囊
3.什么是肾小球
4.Similarities Between Bowman’s Capsule and Glomerulus
5。Side by Side Comparison – Bowman’s Capsule vs Glomerulus in Tabular Form
6。概括

鲍曼的胶囊是什么？

鲍曼的胶囊也被称为肾小球胶囊。这是一个像杯子一样的囊。并且可以在哺乳动物肾脏肾脏的管状部分的开头找到。肾小球被鲍曼的胶囊包围。它执行血液过滤的第一步以形成urine。Bowman的胶囊收集了肾小球中血液中的液体。为了形成尿液，该肾小球滤液进一步处理，以形成尿液。静水压力迫使小分子（如水）glucose,amino acidsand NaCl from the blood in the glomerular capsule into the nephron. This particular process is defined as the超过滤。

鲍曼的胶囊在1842年被一位名为William Bowman爵士的科学家首次确定。鲍曼胶囊外面有两个杆。血管杆是传入和传出的侧面arterioles输入并离开。尿杆是一侧近端复杂管开始。从外部到内部，鲍曼的胶囊中有几层。它们如下，

顶层- 这是一层squamous epithelium。这不参与过滤。

Bowman’s space– The filtrate enters to this layer after passing through the filtration slits.

内脏层 -它只是位于肾小球底膜上方。它由称为足细胞的专门细胞组成。肾小球毛细血管位于内脏层下方。它执行过滤的主要功能。

Filtration barrier –It is composed of the fenestrated endothelium of glomerular capillaries, the fused basal lamina of endothelial cells and podocytes, and the filtration slits of podocytes. This layer permits water, ions, and small molecules from the blood into the Bowman’s space.

什么是肾小球？

肾小球是球形结构（Bowman's Capsule）中的一簇血毛，该毛细血管积极参与血液过滤以形成尿液。它是肾脏功能单元的肾脏肾脏中的关键结构，称为“肾单位”。肾小球还涉及血液的超滤，其中水，离子和小分子（如葡萄糖过滤器）从血液到鲍曼囊，这是由肾单位的管状部分进一步处理的。

该结构以意大利解剖学家Marcello Malpighi（1628-1694）的名字命名。它曾经被称为“马尔皮亚体团”。它过滤血浆。这些血液毛细血管的簇在结构上由脊髓内的肾小球细胞支撑。血液通过血液毛细血管簇的壁过滤，通过肾小球屏障进入类似杯子的囊“鲍曼的胶囊”。然后，滤液（水和其他小分子）进入肾单位的肾小管。

What are the Similarities Between Bowman’s Capsule and Glomerulus?

• 两者都是肾球体的一部分。
• Both are present in “ nephron” which is the functional unit of the kidney.
• 两者都参与血液的超滤过程以形成尿液。
• 这function of both these structures is highly important to form urine and remove waste materials from the body.

差异是什么een Bowman’s Capsule and Glomerulus?

鲍曼的胶囊vs glomerulus
鲍曼（Bowman）的胶囊是膜的双壁胶囊，围绕着肾单位的肾小球。	这glomerulus is a tuft of capillaries in the nephron.
Structure
Bowman’s capsule is a cup-like a sac.	这glomerulus is a cluster of blood capillaries.
Number of Epithelial Layers
鲍曼的胶囊由两个上皮层组成。	肾小球consists of the single epithelial layer.
功能
Bowman’s capsule collects blood, filtrate it and sends it to renal tubule for further processing in order to form urine.	肾小球过滤血浆。
血细胞和血小板
Bowman’s capsule does not contain blood cells and platelets.	肾小球包含血细胞和血小板。
Size
鲍曼的胶囊尺寸更大。	这glomerulus is smaller in size.

摘要 - 鲍曼的胶囊vs肾小球

这Bowman’s capsule is also called as a glomerular capsule. It is a cup-like a sac. This can be found at the beginning of the tubular part of the nephron of the mammalian kidney. The glomerulus is surrounded by the Bowman’s capsule. Bowman’s capsule performs the first step of blood filtration in order to form urine. The fluid from the blood in the glomerulus is collected by the Bowman’s capsule. The glomerular filtrate is further processed along the other parts of the nephron in order to form urine. On the other hand, glomerulus is known as a tuft of capillaries which filters the blood plasma. It consists of endothelial cells. The Bowman’s capsule is a double walled membranous sac-like structure. But glomerulus refers to a cluster of blood capillaries in the nephron.

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Reference:

1.“鲍曼的胶囊。”百科全书大不列颠百科全书，百科全书大不列颠尼加公司Available here
2.“肾细胞。”Wikipedia，Wikimedia基金会，2017年11月14日。Available here

Image Courtesy:

1.’Kidney Nephron By Holly Fischer的艺术品(CC BY 3.0)viaCommons Wikimedia
2.’2612 Blood Flow in the Kidneys’By OpenStax College – Anatomy & Physiology,连接网站。Jun 19, 2013.(CC BY 3.0)viaCommons Wikimedia