Circulation of blood Flashcards
What ventricle wall is more muscular?
Left ventricle
What is microcirculation?
Circulation of blood in the smallest blood vessles (arterioles, precapillary sphincters, venules)
What is the benefit of a parallel circulation?
- Allows independant circulation of blood flow to differnet organs.
- Adapts to the metabolic demands of other tisues
What is the volume of blood in circulation?
Roughly 5L
How many capillaries are in the body?
Roughly 10 billion
Where is the mitral/bicuspid valve located?
Between the left atrium and ventricle
Where is the tricuspid valve located?
Between the right atrium and the right ventricle
What structure attaches to the atrioventricular valves in order to stop the valves inverting?
Chordae tendinae which are attached to papillary muscles
What are the semiluminar valves called?
The aortic valve and the pulmonary valve
What is an Echocardiography
Uses doppler ultrasound to create images of the heart
What type of blood vessel has the smallest diameter?
Capillaries
What is the blood flow of the brain at rest?
650 mL/min (13%)
What is the percentage of blood in the veins, venules and venous sinuses?
64%
What is the percentage of blood in the heart?
7%
What is the percentage of blood in the arteries?
13%
What is the percentage of blood in the pulmonary circulation?
9%
What is the percentage of blood in the arterioles and capillaries?
7%
What is the percentage of blood in systemic circulation? (not heart and pulmonary)
84%
Percentage of blood flow through the kidneys?
950 (20%)
What differentiates cardiac muscle from skeletal?
- Intercalated discs (gap junctions and desmosomes)
What is a syncitium?
A multinucleated cell
