Cardiovascular Flashcards
What are the functions of the cv system
Transport
Maintenance - regulation, homeostasis, thermoregulation, ph,
Protection - white blood cells, clotting
What are the components
Blood
Vessels
Heart
What are the 2 divisions
Pulmonary circuit
Blood to and from lungs
Systemic
Blood to and from rest of the body
What kind of tissue is blood
Connective
What does blood carry
Dissolved gases
Nutrients
Hormones
Metabolic wastes
What does the right atria do
Receives blood from systemic circuit and passes it to right ventricle
What does the right ventricle do
Received blood from right atrium and pumps it into pulmonary circuit
What does the left atrium do
Receives blood from pulmonary circuit and passes to left ventricle
What does the left ventricle do
Receive blood from left atrium and pumps to systemic circuit
How much blood does the heart pump per minute
5L/min at rest
15-20 during exercise
= 8000L per day
What is the Q equation
Hr x sv
Why is the left side of the heart bigger
Left ventricle has to pump to whole body, rather than lungs
What are the layers of the heart wall
Myocardium
Epicardium
Pericardial fluid/space
Pericardium (outer)
What is the pericardium
Made up of fibrous connective tissue, limits expansion
Stabilises the heart
Contains pericardial fluid in pericardial cavity which lubricates
Parietal pericardium = outer serous membrane
Visceral = inner serous membrane- epicardium
What does the pericardial fluid do
Reduce friction during contraction