Font size
S
M
L
XL
WorksheetsCirculatory System Grade 8
Total questions: 85
Worksheet time: 1hrs 25mins
Name
Class
Date
1.
Which of the following is NOT a function of the circulatory system?
a)
Transporting oxygen to body cells
b)
Carrying waste like urea and carbon dioxide
c)
Carrying nutrients and water
d)
Digesting food
e)
Transporting materials over long distances
2.
What are the components of the cardiovascular system?
a)
Blood, blood vessels, heart
b)
Veins, arteries, brain
c)
Blood, lymph, lungs
d)
Blood vessels, heart, lungs
e)
Only arteries and veins
3.
What is the role of the heart in the circulatory system?
a)
Carries oxygen only
b)
Acts as a pump
c)
Stores nutrients
d)
Regulates body temperature
e)
Filters waste products
4.
Which fluid is part of the lymphatic system?
a)
Plasma
b)
Lymph
c)
Cerebrospinal fluid
d)
Synovial fluid
e)
Tissue fluid
5.
Which system runs parallel to the circulatory system within the human body?
a)
Nervous system
b)
Respiratory system
c)
Digestive system
d)
Excretory system
e)
Lymphatic system
6.
What is the fluid matrix of blood called?
a)
Plasma
b)
Lymph
c)
Pericardium
d)
Cytoplasm
e)
Haemoglobin
7.
Which pigment gives red blood cells their color?
a)
Hemoglobin
b)
Chlorophyll
c)
Myoglobin
d)
Keratin
e)
Collagen
8.
Which cells defend the body against infections?
a)
Platelets
b)
Red blood cells
c)
White blood cells
d)
Plasma
e)
Lymphocytes
9.
What role do platelets play when a blood vessel is damaged?
a)
Carrying oxygen
b)
Blood clotting
c)
Carrying nutrients
d)
Excreting wastes
e)
Regulating temperature
10.
Which component of blood helps in heat distribution?
a)
Plasma
b)
White blood cells
c)
Platelets
d)
Red blood cells
e)
Hormones
11.
What is the function of blood vessels?
a)
Produce heat
b)
Digest food
c)
Transport blood
d)
Absorb oxygen
e)
Store minerals
12.
Which are the three types of blood vessels?
a)
Arteries, Veins, Capillaries
b)
Arteries, Capillaries, Valves
c)
Veins, Arteries, Nerves
d)
Nerves, Veins, Capillaries
e)
Arteries, Arterioles, Venules
13.
Which artery carries deoxygenated blood from the heart to the lungs?
a)
Aorta
b)
Pulmonary artery
c)
Inferior vena cava
d)
Superior vena cava
e)
Left coronary artery
14.
Which is the largest artery in the human body?
a)
Pulmonary artery
b)
Superior vena cava
c)
Inferior vena cava
d)
Capillaries
e)
Coronary artery
15.
What are the names of the two coronary arteries?
a)
Right and left coronary arteries
b)
Right and left atria
c)
Right and left ventricles
d)
Left and right auricles
e)
Right and left coronary arteries
16.
Which vein brings oxygenated blood from the lungs to the heart?
a)
Pulmonary vein
b)
Aorta
c)
Right atrium
d)
Superior vena cava
e)
Left ventricle
17.
What are the smallest veins in the body called?
a)
Venules
b)
Ventricles
c)
Capillaries
d)
Arterioles
e)
Atrium
18.
Which veins are the largest in the body?
a)
Superior and inferior vena cava
b)
Pulmonary veins
c)
Right atrium
d)
Left atrium
e)
Left ventricle
19.
What connects arteries to veins in the body?
a)
Capillaries
b)
Valves
c)
Arteries
d)
Veins
e)
Nerves
20.
What is the role of capillaries?
a)
Prevent infections
b)
Permit exchange of gases
c)
Carry nutrients only
d)
Carry waste only
e)
Prevent blood clotting
21.
Why do veins appear blue through the skin?
a)
Because blood is blue
b)
Due to reflected blue light
c)
Because blood lacks oxygen
d)
Because blood is low in iron
e)
Because of green pigment
22.
What is the size of the human heart compared to?
a)
Size of a tennis ball
b)
Size of a clenched fist
c)
Size of a football
d)
Size of a mango
e)
Size of an apple
23.
Which tissue in the heart acts as the pacemaker?
a)
Sinoatrial node
b)
Atrioventricular valve
c)
Bundle of His
d)
Purkinje fibers
e)
Pericardium
24.
What is the pericardium?
a)
Heart chamber
b)
Double-walled sac
c)
Heart valve
d)
Artery wall
e)
Capillary wall
25.
Which fluid provides lubrication to the heart during contraction and relaxation?
a)
Blood plasma
b)
Pericardial fluid
c)
Lymph
d)
Perilymph
e)
Cerebrospinal fluid
26.
How many chambers does the human heart have?
a)
2
b)
3
c)
4
d)
5
e)
6
27.
What are the upper chambers of the heart called?
a)
Ventricles
b)
Atria or Auricles
c)
Aorta
d)
Capillaries
e)
Valves
28.
Which chambers pump blood with greater pressure?
a)
Auricles
b)
Ventricles
c)
Septum
d)
Veins
e)
Arteries
29.
What separates the two auricles?
a)
Interatrial septum
b)
Interventricular septum
c)
Atrioseptum
d)
Coronary septum
e)
Septum atria
30.
What separates the two ventricles?
a)
Atrioseptum
b)
Interauricular septum
c)
Ventricular septum
d)
Auricular septum
e)
Septum ventricles
31.
Which septum separates the right and left ventricles?
a)
Atrioventricular septum
b)
Interventricular septum
c)
Venous septum
d)
Capillary septum
e)
Coronary septum
32.
Which valve guards the right auricle into the right ventricle?
a)
Tricuspid valve
b)
Bicuspid valve
c)
Aortic valve
d)
Pulmonary valve
e)
Mitral valve
33.
Which valve guards the left auricle into the left ventricle?
a)
Bicuspid valve
b)
Tricuspid valve
c)
Pulmonary valve
d)
Aortic valve
e)
Mitral valve
34.
Which valves are shaped like half-moons?
a)
Semilunar valves
b)
Arterioles
c)
Aortic valves
d)
Mitral valves
e)
Vena cava valves
35.
Which valve prevents backflow from left ventricle into left auricle?
a)
Bicuspid valve
b)
Aortic semilunar valve
c)
Tricuspid valve
d)
Pulmonary semilunar valve
e)
Septum valve
36.
Which valve prevents backflow from right ventricle into right auricle?
a)
Tricuspid valve
b)
Pulmonary semilunar valve
c)
Bicuspid valve
d)
Aortic semilunar valve
e)
Auricular valve
37.
Which side of the heart deals with oxygenated blood?
a)
Left side
b)
Right side
c)
Left atrium
d)
Left ventricle
e)
Septum
38.
Which side of the heart deals with deoxygenated blood?
a)
Right side
b)
Left side
c)
Right atrium
d)
Right ventricle
e)
Aorta
39.
Which circulation carries blood from the heart to the lungs and back?
a)
Systemic circulation
b)
Pulmonary circulation
c)
Coronary circulation
d)
Cardiac circulation
e)
Atrial circulation
40.
Which circulation carries blood from the heart to body organs and back?
a)
Pulmonary circulation
b)
Systemic circulation
c)
Pulmonary vein circulation
d)
Venous circulation
e)
Aortic circulation
41.
How many times does blood flow through the heart in double circulation?
a)
Once
b)
Twice
c)
Thrice
d)
Four times
e)
Five times
42.
Which vein brings deoxygenated blood from the body to the heart?
a)
Pulmonary vein
b)
Superior and inferior vena cava
c)
Aorta
d)
Pulmonary artery
e)
Right atrium
43.
Which vein brings oxygenated blood from lungs to the heart?
a)
Pulmonary artery
b)
Pulmonary vein
c)
Superior vena cava
d)
Inferior vena cava
e)
Left atrium
44.
Which chamber pumps blood to the lungs?
a)
Left ventricle
b)
Right atrium
c)
Right ventricle
d)
Left atrium
e)
Left coronary artery
45.
Which chamber pumps blood to the rest of the body?
a)
Right ventricle
b)
Left ventricle
c)
Left atrium
d)
Right atrium
e)
Right coronary artery
46.
What is the rhythmic contraction of the chambers of the heart called?
a)
Systole
b)
Diastole
c)
Heartbeat
d)
Pulse
e)
Blood pressure
47.
What is the relaxation of the chambers of the heart called?
a)
Diastole
b)
Systole
c)
Pulse
d)
Heartbeat
e)
Cardiac arrest
48.
What is the rhythmic movement of the heart as it pumps blood called?
a)
Heartbeat
b)
Pulse
c)
Systole
d)
Diastole
e)
Palpitation
49.
What is the normal rate of heartbeat for an adult?
a)
72 beats/minute
b)
60 beats/minute
c)
90 beats/minute
d)
80 beats/minute
e)
100 beats/minute
50.
Which chambers pump deoxygenated blood in pulmonary circulation?
a)
Right auricle and right ventricle
b)
Left auricle and right ventricle
c)
Right ventricle and left auricle
d)
Aorta and vena cava
e)
Pulmonary artery and vein
51.
Which chambers pump oxygenated blood in systemic circulation?
a)
Left auricle and left ventricle
b)
Right auricle and right ventricle
c)
Left ventricle and right atrium
d)
Pulmonary veins
e)
Superior and inferior vena cava
52.
What does lymph contain?
a)
White blood cells
b)
Red blood cells
c)
Lymphocytes
d)
Platelets
e)
Minerals only
53.
Which organs are examples of lymphoid organs?
a)
Spleen and tonsils
b)
Liver and kidney
c)
Pancreas and thyroid
d)
Brain and spinal cord
e)
Skin and muscles
54.
What condition occurs when rhythmic movement of heart muscles is disturbed?
a)
Palpitation
b)
Cardiac arrest
c)
Hypertension
d)
Diabetes
e)
Systole
55.
What is cardiac arrest?
a)
Sudden stop of heart pumping
b)
Heart beats too fast
c)
Heart beats irregularly
d)
Sudden stop of breathing
e)
Relaxation of heart
56.
What is hypertension?
a)
Low blood pressure
b)
High blood pressure
c)
Normal pressure
d)
Silent heart
e)
Fever
57.
What is the normal blood pressure for an adult?
a)
120/80 mmHg
b)
100/60 mmHg
c)
140/90 mmHg
d)
150/100 mmHg
e)
80/40 mmHg
58.
Which pressure is measured when ventricles contract?
a)
Diastolic pressure
b)
Systolic pressure
c)
Pulse rate
d)
Blood pressure
e)
Brain pressure
59.
Which pressure is measured when the heart relaxes?
a)
Systolic pressure
b)
Diastolic pressure
c)
Heart pressure
d)
Lung pressure
e)
Arterial pressure
60.
What are common causes of hypertension?
a)
Smoking, stress, high salt intake
b)
Excess exercise
c)
Obesity, poor diet, smoking
d)
Lack of sleep
e)
High oxygen intake
61.
Which instrument is used to measure blood pressure?
a)
Stethoscope
b)
Sphygmomanometer
c)
Thermometer
d)
ECG machine
e)
X-ray machine
62.
What colour is lymph fluid?
a)
Pale yellow
b)
Red
c)
Green
d)
Blue
e)
White
63.
What is the function of lymph nodes?
a)
Destroy germs
b)
Store oxygen
c)
Produce hemoglobin
d)
Transport oxygen
e)
Store glucose
64.
What can hypertension cause if untreated?
a)
Diabetes
b)
Asthma
c)
Fever
d)
Stroke
e)
Low pulse
65.
Which circulation route goes through the lungs?
a)
Pulmonary circulation
b)
Systemic circulation
c)
Coronary circulation
d)
Venous circulation
e)
Lymphatic circulation
66.
What are antigens?
a)
Protein substances
b)
Carbohydrates
c)
Fats
d)
Minerals
e)
Hormones
67.
Where are antigens found?
a)
On RBCs
b)
In plasma
c)
On WBCs
d)
In lymph
e)
In stomach
68.
What are antibodies?
a)
Protein molecules
b)
Carbohydrate molecules
c)
Fat molecules
d)
Mineral molecules
e)
Hormone molecules
69.
Where are antibodies found?
a)
In plasma
b)
On RBCs
c)
In heart
d)
In tissues
e)
In lungs
70.
How is human blood classified into groups?
a)
Based on antigens and antibodies
b)
Based on haemoglobin
c)
Based on DNA
d)
Based on plasma colour
e)
Based on enzymes
71.
Who introduced the ABO blood grouping system?
a)
Karl Landsteiner
b)
Robert Koch
c)
Louis Pasteur
d)
Alexander Fleming
e)
Charles Darwin
72.
In which year was the ABO system introduced?
a)
1900
b)
1800
c)
1920
d)
1950
e)
1850
73.
How many blood groups exist in the ABO system?
a)
4
b)
3
c)
2
d)
5
e)
6
74.
Which antigens are present in blood group A?
a)
Antigen A
b)
Antigen B
c)
None
d)
Antigen A and B
e)
Antigen C
75.
Which antibodies are present in blood group A?
a)
Antibody b
b)
Antibody a
c)
Antibody c
d)
None
e)
Antibody d
76.
Which antigens are present in blood group B?
a)
Antigen B
b)
Antigen A
c)
None
d)
Antigen A and B
e)
Antigen C
77.
Which antibodies are present in blood group B?
a)
Antibody a
b)
Antibody b
c)
Antibody c
d)
None
e)
Antibody d
78.
Which antigens are present in blood group AB?
a)
Antigen A and B
b)
Antigen A only
c)
Antigen B only
d)
None
e)
Antigen C
79.
Which antibodies are present in blood group AB?
a)
None
b)
Antibody a
c)
Antibody b
d)
Antibody a and b
e)
Antibody c
80.
Which antigens are present in blood group O?
a)
None
b)
Antigen B only
c)
Antigen A only
d)
Antigen A and B
e)
Antigen C
81.
Which antibodies are present in blood group O?
a)
Antibody a and b
b)
Antibody a only
c)
Antibody b only
d)
None
e)
Antibody d
82.
Who is called a universal donor?
a)
Person with blood group O
b)
Person with blood group A
c)
Person with blood group AB
d)
Person with blood group B
e)
Person with blood group C
83.
Who is called a universal recipient?
a)
Person with blood group AB
b)
Person with blood group B
c)
Person with blood group O
d)
Person with blood group O
e)
Person with blood group C
84.
What is the process of transferring blood called?
a)
Blood transfusion
b)
Blood grouping
c)
Plasma separation
d)
Blood donation
e)
Clotting
85.
What happens if the donor blood does not match the recipient blood?
a)
Clumping of blood
b)
Fever
c)
Anaemia
d)
Stroke
e)
None
Reset
