Vascular Physiology Flashcards
Cells of vascular system include:
Inner layer of endothelial cells
Internal layer of smooth muscle cells
Adventitial layer
Adventitial layer function:
Contain cots of fibroblasts; responsible for laying down extraceullar matric and repair processes
Arteries have high or low pressure system?
High pressure system
Veins have high or low pressure system?
Low pressure system
Elastic laminae function
Maintains pulsatile strength of blood and vessel integrity
Difference between veins and arteries: SMCs
Arteries = SMcells
Veins = few SMCs
Difference in arteries and veins for adventitia layer
Arteries: fibroblasts + extensive connective tissue
Veins: thick elastic tissue + loose connective tissue
Why do blood vessels become more rigid as we get older?
Ability for elastic laminae to stretch reduces over time
Vein structure
Large lumens and thin walls, Blood under low pressure
Back flow prevented by valves
3 types of capillaries
Continuous
Fenestrated
Sinusoid
Form network between arteries and veins?
Capillaries
Function of capillaries
To allow transfer of nutrients/waste products to/from tissues
Lymphatic system characteristics
Thin walled vessels complimentary to vascular system that carry lymph (tissue fluid, fats, clus)
Have into intimal, small medial and small Adventitial layers
Blood flow through the vessels of the body is regulated by?
- The fluid force of the Blood cause by contraction of heart
- The size of vessels
- The action of SMCs
- One-way valves
Measure of the contractile force is?
Systolic pressure