Chapter 21: Peripheral Vascular System and Lymphatic System Flashcards
What does the vascular system primarily transport?
Fluids like blood and lymph.
What is the primary function of arteries?
Carry blood away from the heart.
What allows arterial walls to stretch during systole?
Elastic fibers in the walls.
Which artery is NOT accessible for examination?
Aorta.
How do veins primarily function?
Drain deoxygenated blood back to the heart.
What prevents backflow of blood in veins?
Intraluminal valves.
Which mechanism aids blood movement in the venous system?
Skeletal muscle contraction.
What role does the pressure gradient from breathing play?
Aids in moving blood toward the heart.
Which veins are accessible for examination in the arms?
Superficial and deep veins.
How does skeletal muscle contraction aid blood flow?
It propels blood through veins towards the heart.
What effect does breathing have on blood movement?
It creates a pressure gradient that aids blood flow.
What is the role of intraluminal valves in veins?
To prevent backflow and ensure unidirectional blood flow.
Why are veins called capacitance vessels?
They can stretch to accommodate increased blood volume.
What is a major risk factor for venous stasis?
Prolonged positions like standing or sitting.
Which condition is NOT a contributing factor to venous stasis?
Increased physical activity.
What is the primary function of the lymphatic system?
To retrieve fluid from tissues and return it to blood.
Where does the right lymphatic duct empty?
Into the right subclavian vein.
Which duct drains lymph from the majority of the body?
The thoracic duct.
What is one key function of the lymphatic system?
Fluid conservation and returning plasma proteins to blood.
What crucial role does the lymphatic system serve?
Defense against disease and absorption of lipids.
What is the primary structure of lymph nodes?
Small, oval clumps of lymphatic tissue.
What do lymph nodes do with lymph fluid?
They filter it and remove harmful organisms.
What causes lymph nodes to become swollen and tender?
Local inflammation in the affected area.
Which lymph nodes drain the head and neck?
Cervical nodes.
What is one function of the spleen?
Destruction of old red blood cells.
Which tonsils are located at the entrance to the respiratory tract?
Palatine tonsils.