Introduction To The Arteries ,veins And Lymphatics Flashcards
Arteries
Transport blood away from the heart , and they have thick walls to withstand that pressure
Veins
Transport blood towards the heart
Capillaries
Connects arteries and veins
Level at which oxygen and nutrients and waste are exchanged within the tissue
Arteries - Tunica intima
Inner most layer
Endothelial lining
Arteries - Tunica Media
Loads of Layers of smooth muscle and elastic tissues
Arteries- Tunica externa
Outer connective tissue layer
Veins - Tunica intima
Endothelial lining
Valves
Veins - Tunica media
Limited smooth muscle layer
Elastic layer
Most common circulatory route
Heart - arteries - arterioles -capillary bed - venules- veins -heart
Circulatory route : portal system
Blood flows through the capillary bed and then to the heart
Btw liver and intestines
Anterior pituitary
Circulatory route - arteriovenous shunt
Goes from arteries to the veins directly
Can be found , toes , fingers and ears
Anastomosis
The union of branches of two or more vessels (alternative routes for blood to reach organs )
What does the lymphatic system do
Drains excessive interstitial fluid