Heart And Circulation Flashcards
What is a closed circulation system
Blood remains in a continious system of blood vessels eg. Humans
Advantages of a closed circulation system
Blood can be pumped faster
Nutrients can be delivered faster to cells allowing organism to be more active
Main parts of human circulation system
Arteries Arterioles Veins Venules Capillaries
Function of artery
Carry oxygenated blood away from the heart under high pressure
Function of vein
Carry blood towards the heart under low pressure
Label artery and veins
Collagen
Muscle and elastic fibres
Endothelium
Lumen
Role of arterioles
Connect arteries and capillaries
Function of venules
Connect capillaries to the veins
Function of capillaries
Tiny blood vessels linking arteriolew and venules
Location or the heart
Between the lungs, slightly to left side of the thorax, above diaphgram
Function of heart
Pump blood around the body
What muscle is the heart made of
Cardiac muscle - never fatigues
What is the systemic circuit
Pumps to the head, trumk and limbs and back to the heart
What is the pulmonary circuit
Pumps to lungs and back to heart
Advantages of double circulation system
Seperation of oxygen rich and poor blood
Bood pressure can be kept high
