The Heart Flashcards
Which side of the heart is the blood oxygenated?
Left side
What side of the heart is the blood deoxygenated?
The right side
What happens when the heart expands?
Blood flows into the atria from the vena cava and the lungs through pulmonary vein
What happens when the heart contracts?
Blood flows away from the ventricles to the lungs through the pulmonary artery and to the body through the aorta
What does an ECG measure?
The electrical current going through the heart
What are capillaries?
Very thin blood vessels, create a capillary bed to supply every cell with blood
What are veins?
Vessels that carry blood to the heart
What are arteries?
Vessels that carry blood from the heart to the body
What is thicker - an artery or vein?
Artery
Where do red blood cells develop?
In bone marrow
How long of red blood cells circulate in the body for?
120 days
What percentage of plasma is water?
90%
What do platelets do?
Clot the blood, play role in immune system
What do the white blood cells do?
Clean immune system; help fight bacteria,viruses, cancer cells, infections and diseases; second line of defence - protect against foreign bodies
What do red blood cells do?
Carry oxygen and iron (haemoglobin) around the body
What do the coronary arteries do?
Supply blood to heart
What is the muscle that separates the sides of the heart called?
Septum
What is the largest vein in the body called?
Vena cava
What is deoxygenated blood?
Blood poor in oxygen
What is oxygenated blood?
Rich in oxygen
What is breathing in called?
Inhalation
What is breathing out called?
Exhalation
Oxygen makes it’s way into the blood from what part of the lungs?
The alveoli
What is the largest artery in the body called?
The aorta
