6 - Anatomy of the Circulatory System Flashcards
What 3 types of circulatory systems are there and what are their subcategories?
Blood Circulatory System:
Systemic, Pulmonary, Coronary
Specialised Circulatory System:
Portal, Foetal
Lymphatic Circulatory System
What is an Anastomose?
A connection between 2 blood vessels
- reroute blood to other vessels if transporting vessel blocked/compromised -> so that blood still reaches organ/tissue
Do pulmonary arteries carry oxygenated or deoxygenated blood?
Deoxygenated Blood
Do pulmonary veins carry oxygenated or deoxygenated blood?
Oxygenated Blood
What are portal circulations?
Blood draining from one capillary bed passes through a portal vessel (a vein) to another 2nd capillary bed before returning to the heart
Why does foetal circulation occur?
Because the lungs, liver & GI tract aren’t sufficiently developed in a foetus, so they’re bypassed
What is the function of the lymphatic circulatory system?
-It’s involved in the body’s defence mechanisms
-It provides a mechanism for the drainage of interstitial fluid
Where does excess interstitial fluid go?
It enters the lymphatic capillaries as lymph
Describe the structure of lymphatic drainage?
Lymph Capillaries -> Lymph Vessels -> through Lymph Nodes -> Lymph Trunks -> Thoracic Duct / or Right Lymphatic Duct
What are lymph nodes & what do they do?
- Encapsulated aggregations of lymphocytes (WBCs) located along lymphatic vessels
Function: - Filter lymph & trap foreign particles
- Some particles destroyed by macrophages (WBCs)
Where does the right side of the head, neck, thorax & upper limb drain to (lymphatic drainage)?
The right lymphatic duct, which further drains into the right subclavian vein
Where does the rest of the body drain to (lymphatic drainage)?
The thoracic duct, which further drains into the left subclavian vein
