Flashcards in Fluid shift across the capillary wall : pulmonary and systemic oedema Deck (17)
What fraction of body water us extracellular fluid?
How much of extra-cellular fluid is interstitial and what does interstitial mean?
Bathing the body cells
What does interstitial fluid act as?
A go between for blood and body cells
The 4 components of the cardiovascular system?
What do capillaries do?
-Allow rapid exchange of gases, water and solutes with interstitial fluid
-Deliver nutrients and O2 to body cells
-Remove metabolites from cells
How many layers of endothelial cells on a capillary?
What does blood flow into the capillary depend on?
Contractile state of the arterioles
What do terminal arterioles do?
Regulate regional blood flow to the capillary bed in most tissues
What do precapillary sphincters do?
Regulate blood flow in few tissues
Why is blood flow through the capillary bed slow?
To allow adequate time for exchange
What do capillaries unite to form?
How are exchangeable proteins moved across capillary wall?
What generally can't cross capillary wall?
Plasma proteins and large molecules
What do lipid soluble substances go through in the capillary wall?
Endothelial cells of wall
What do water soluble substances go through in the capillary wall?
What is transcapillary fluid flow passively driven by?
Pressure gradients across capillary wall