Cardiovascular Flashcards
Plasma is
55pc of blood
Transports substances around body
What does plasma transport
Mineral salts Nutrients Waste Hormones Enzymes Gasses Antibodies
Another word for rbc
Erythrocytes
Do rbc have nucleus
No
Rbc life span
120 days
Wbc also called
Leuocytes
Where are wbc made
Bone marrow
Platelets are also called
Thrombocytes
Function clot blood
Platelet lifespan
10 days
Heart divides into
Atria and ventricles
What divides left and right side of heart
Septum
Heart has a muscular wall of 3 layers
Endocardium
Myocardium
Pericardiam- double walled sack
What’s heart beat
Atria both contract forcing contents into ventricles
Ventricles contract and empty into artieries
Ventricles relax
Rest diastole equates to
Contraction systole
What’s a pulse
Wave of artery wall distension
Pulmonary artery carries
Deoxygenated blood from heart to life lungs
Blood returns to heart via
Pulmonary vein
Circulation process
Deoxygenated blood flows into right atrium from superior vena cava
Then into right ventricle
Then it’s pumped into the pulmonary artery
Blood reaches the lungs via capillaries
Lungs remove C02 and replace it with oxygen
Oxygenated blood returns to heart through pulmonary veins and into left atrium
Left atrium pushes blood into left ventricle via bicuspid valve
Left ventricle contracts and pumps blood to aorta
Valves
Maintain direction of blood
What are semi lunar valves
3 pocket shaped flaps at the besssls entrance on the aorta
Inferior and superior vena cava take deoxygenated blood from lower and upper body
True
What do semi lunar valves do
Ensure no backflow
From aorta to left ventricle
Or
Pulmonary artery to right ventricle
2 largest veins in body
Inferior and superior vena cava the
Mitral valve
Separates left atrium
And ventricle
Tricuspid valve
Separates right atrium and ventricle
Portal circulation
Blood from small intestine and right half of colon to liver
Systemic arteries and pulmonary arteries
Carry oxygenated and deoxygenated blood
Arterioles
Smaller version of arteries, slightly contracted to maintain blood pressure
What happens to arterioles in shock
They relax and blood pressure drops
Veins structure
3 layered walls
Much thinner
Larger lumen
Low blood pressure
Pulmonary veins carry
Oxygenated blood-to heart
