血液和血淋巴之间的差异

Thekey differencebetween blood and hemolymph is thatblood contains红细胞并且它运输氧气，而血淋巴不包含红细胞，也不参与氧气转运。

血液和血淋巴是生物体中发现的两种不同类型的循环液。血液是脊椎动物中循环的流体，而血淋巴是大多数无脊椎动物的流体循环。血淋巴类似于脊椎动物中的血液。血液和血淋巴在整个人体中分布营养和激素。血管内血管中流动，而血淋巴在开放空间中流动或存在于称为的体腔中haemocoel. Blood consists of red blood cells or erythrocytes which transport oxygen. However, hemolymph does not contain red blood cells. Moreover, unlike blood, hemolymph contains a high concentration of free amino acids.

内容

1.Overview and Key Difference
2.What is Blood
3.什么是血淋巴
4.Similarities Between Blood and Hemolymph
5.Side by Side Comparison – Blood vs Hemolymph in Tabular Form
6.概括

What is Blood?

Blood is the fluid that circulates in the vertebrate body via blood vessels. It delivers oxygen and nutrition to body parts. It transports waste of metabolic processes away from the cells and tissues. There are several types of blood cells suspended in blood plasma. Therefore, blood contains red blood cells, white blood cells, platelets and blood plasma.

From the total volume of blood, red blood cells account for 45% while the plasma account for about 54.3% and white cells content is about 0.7%. It also has glucose and other dissolved nutrients. The average density of blood is around 1060 kg/m³. Moreover, blood has coagulation factors or elements. The pH of the normal blood is around 7.2. An average person has 5 litres of blood.

什么是血淋巴?

Hemolymph is the fluid that is analogous to the blood in vertebrates. It is the fluid that fills the haemocoel of most invertebrates. Haemocoel is a body cavity. Hence, it is an开放式循环系统. Unlike blood, hemolymph does not contain red blood cells andhaemoglobin. Hence, it is not used to transport oxygen. But in certain species, hemolymph plays some role in respiration.

The main component of hemolymph is water. It also contains ions, carbohydrates, lipids, amino acids, hormones, some cells (hemocytes) and pigments. Hemolymph contains a high concentration of free amino acids. It is a colourless fluid and passes more or less freely throughout the tissues. Hence, hemolymph is in direct contact with animal tissues all the time. Hemolymph works as a water storage pool as well. Furthermore, it plays important roles in the immune system and in the transport of hormones, nutrients, and metabolites in invertebrates.

What are the Similarities Between Blood and Hemolymph?

• Hemolymph is a fluid that is analogous to the blood in vertebrates.
• Both fluids distribute nutrients and hormones.
• They also help in removing waste.

What is the Difference Between Blood and Hemolymph?

血液是一种在循环系统内部循环的液体，而血淋巴是类似于血液的液体，填充了无脊椎动物的骨co。血液含有红细胞，而血淋巴不含红细胞。因此，这是血液和血淋巴之间的关键区别。血浆以及称为血小板的不同细胞和细胞片段是血液的主要成分，而水，离子，碳水化合物，脂质，氨基酸，激素，一些细胞（血细胞）和颜料是血淋巴结的成分。此外，血液具有血红蛋白，并且它运输氧气，而血淋巴不含血红蛋白，也不输送氧气。

The below infographic tabulates more differences between blood and hemolymph.

摘要 - 血液与血淋巴

Blood and hemolymph are two types of fluids circulating the body. In vertebrates, blood is the fluid that transports oxygen, carbon dioxide, nutrients and hormones throughout the body. In most invertebrates, hemolymph is the circulating fluid that is analogous to blood. However, unlike blood, hemolymph does not contain red blood cells and haemoglobin. It circulates within an open circulatory system, which is a body cavity called haemocoel. Moreover, unlike blood, hemolymph is in direct contact with animal tissues. Thus, this summarizes the difference between blood and hemolymph.

Reference:

1.“血液的成分。”血液的成分|OpenStax Biology 2E，2018年3月7日，Available here.
2.“血淋巴。”。百科全书大不列颠百科全书，百科全书大不列颠公司，Available here.

Image Courtesy:

1. “Human Heart and Circulatory System” ByBryan Brandenburg–(CC BY-SA 3.0)viaCommons Wikimedia
2. Mdunton16的“开放式电路” - 自己的作品(CC BY-SA 4.0)viaCommons Wikimedia