Which of the
following blood vessels carry blood towards the heart from rest of the body?
a) arteries
b) veins
c) capillaries
d) nerves
Which of the following vessels have valves which prevent the backflow of blood?
a) arteries
b) veins
c) capillaries
d) nerves
Which of the following blood vessels generally carry deoxygenated blood?
a) veins
b) arteries
c) capillaries
d) all of these
Which of the following vein carry oxygenated blood?
a) pulmonary vein
b) renal vein
c) femoral vein
d) vena cava
Why blood sample is taken from veins?
a) they are larger
b) they have thinner walls
c) blood flow is slower in them
d) all of these
Heart:
The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.
The heart has four chambers
The right atrium receives blood from the veins and pumps it to the right ventricle.
The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen.
The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.
The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body. The left ventricle’s vigorous contractions create our blood pressure.
