相关实验视频
Updated: Jul 12, 2026
05:03
Effective Rapid Blood Perfusion in Xenopus
Published on: May 16, 2023
概括
爬行动物的肺部比哺乳动物的肺部失去的血液要多得多. 在喘息期间,爬行动物停止血损失并重新吸收液体,与哺乳动物不同,表现出不同的心血管适应.
科学领域:
- 比较生理学比较生理学
- 呼吸系统生理学 呼吸系统生理学
- 心血管生理学心血管生理学
背景情况:
- 哺乳动物的肺部在通风过程中保持液体平衡.
- 爬行动物的呼吸和心血管系统表现出独特的适应性.
研究的目的:
- 为了比较通风爬行动物和哺乳动物肺部的流体运动动态.
- 为了研究喘息对爬行动物的液体平衡的影响.
主要方法:
- 在呼吸过程中对爬行动物的肺部血流体动力学的分析.
- 与哺乳动物肺中的流体动力学进行比较.
- 在爬行动物喘息期间观察液体转移.
主要成果:
- 透气的爬行动物肺部比哺乳动物肺部净血损失大10至20倍.
- 爬行动物喘息期间血液流量减少会阻止血损失.
- 爬行动物在呼吸期间从组织中重新吸收净液体.
结论:
- 爬行动物和哺乳动物之间存在流体运动动态和肺部"干燥"的显著差异.
- 爬行动物流体动力学反映了更多的心血管性能变化,特别是在屏息期间.
相关概念视频
01:15Glomerular Filtration
The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
01:32Filtration and Urine Formation
The function of the kidneys is to filter, reabsorb, secrete, and excrete. Every day the kidneys filter nearly 180 liters of blood, initially removing water and solutes but ultimately returning nearly all filtrates into circulation with the help of osmoregulatory hormones. This process removes wastes and toxins but is also crucial to maintain water and electrolyte levels. Most of these functions are performed by the tiny but numerous nephrons contained within the kidneys.