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Blood Circulation in Human Body
All notes and Exercise
Important Points to remember
The system of the body which helps to transport oxygen, carbon dioxide, nutrients, excretory products, hormones, and other substances from one part of the body to the other part is called the circulatory system.
Blood is a typical connective tissue that circulates in a closed system of blood vessels. It consists of plasma and blood cells.
Plasma is the liquid part of the blood into which float different types of blood cells.
Fibrinogen helps in the clotting of blood at the wound.
The iron-rich respiratory pigment is called hemoglobin.
Anemia is an abnormal decrease in the number of RBCs or in the amount of hemoglobin or both.
Leukemia is an increase in the number of leukocytes ( WBC's). It is also known as blood cancer.
The heart is surrounded by two delicate membranes called pericardial membranes between which there is a fluid called pericardial fluid.
The contraction and relaxation of the heart are called systole and diastole.
The force exerted by blood against the wall of a vessel is called blood pressure.
The instrument which is used to measure blood pressure is called a sphygmomanometer.
Blood is a typical connective tissue that circulates in a closed system of blood vessels. It consists of plasma and blood cells.
Plasma is the liquid part of the blood into which float different types of blood cells.
Fibrinogen helps in the clotting of blood at the wound.
The iron-rich respiratory pigment is called hemoglobin.
Anemia is an abnormal decrease in the number of RBCs or in the amount of hemoglobin or both.
Leukemia is an increase in the number of leukocytes ( WBC's). It is also known as blood cancer.
The heart is surrounded by two delicate membranes called pericardial membranes between which there is a fluid called pericardial fluid.
The contraction and relaxation of the heart are called systole and diastole.
The force exerted by blood against the wall of a vessel is called blood pressure.
The instrument which is used to measure blood pressure is called a sphygmomanometer.
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Modern Graded Science
All Exercises
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Test Yourself
MCQ's
1. Arteries are blood vessels that:
A. carry blood away from the heart
B. carry oxygenated blood
C. carry blood towards the heart
D. carry deoxygenated blood
E. carry blood at low pressure
2. The systemic circulation includes all of the
following structures except one. Which is
the exception?
A. the aorta
B. the femoral vein
C. the superior vena cava
D. the pulmonary vein
E. the renal artery
3. Vascular resistance is determined by:
A. length of a blood vessel
B. viscosity of blood
C. the way blood flow through a vessel
D. diameter of a blood vessel
E. blood pressure
4. In the heart, valves that ensure one-way flow
of blood are found:
A. between the atria and the ventricles
B. between the ventricles and the arteries
C. between the vena cavae and the atria
D. Options A and B
E. Options A and C
5. The expression ‘cardiac cycle’ refers to:
A. the sequence of events in the heart that
take place every minute
B. the volume of blood pumped by the
ventricles every minute
C. the sequence of events that can be seen on
an electrocardiogram
D. the sequence of events that create heart
sounds
E. the sequence of events that take place
between one heartbeat and the next
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