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Describe the structure of a capillary wall?
capillary walls are very thin, often a cell thick. artery walls have two thick layers.
The respiratory membrane is a combination of?
alveolar and capillary walls and their fused basement membranes
What does the thinnest of the capillary walls allow?
only metabolic wastes out of the capillary
Strength of arterial and capillary walls?
The arterial and capillary walls are incredibly strong. This is true otherwise you would be bleeding just by tapping yourself.
What are the common problems about capillary?
they have skinny walls
What are the four Layers of alveolar capillary membrane?
→ layers from alveolus to capillary ①surfactant layer (inside alveolus) ②pneumocyteⅠ(typeⅠ cell) layer ③fused basal lamina (consists of basal laminae of alveolar epithelium and capillary endothelium) ④endothelium (inside capillary)
How does capillary wall receive oxygen?
Capillary walls receive oxygen in the lungs by a process known as diffusion.
What can squeeze themselves through capillary walls?
neutrophils
What is the movement of leukocytes through capillary walls?
diapedesis
What is water forced through capillary walls by?
Osmosis
How many layers thick is a capillary?
Capillaries are only one cell layer thick, which allows for the exchange of nutrients and gases between the blood and tissues. This thin structure promotes efficient diffusion and transport across the capillary walls.
What is permeability an important characteristic of?
Capillary walls & Cell membranes
