Science Class 7th

81. The secretion of liver is called_______

A) Bile

B) Saliva

C) Gastric juice

D) Pancreatic juice

82. The mechanical breakdown of food start in the __________.

A) Large intestine

B) Small intestine

C) Liver

D) Mouth

83. The alternate name of trachea is _________.

A) Wind pipe

B) Esophagus

C) Larynx

D) Lungs

84. The structure which separates chest cavity from the abdominal cavity is called the__________.

A) Cartilage

B) Ribs

C) Diaphragm

D) All of them

85. Human beings have a transport system to carry useful materials to where they are needed and to remove ______ materials from where they are produced.

A) Waste

B) Useful

C) Both of them

D) None of these

86. Waste matter produced in the body is also transported by the circulatory system to _________.

A) Excretory organs

B) Abdominal cavity

C) Both of them

D) None of these

87. Heart is located in the chest cavity between the two________.

A) Lungs

B) kidney

C) Trachea

D) None of these

88. The heart is protected by the ribs and covered by a tough double walled membrane called the __________.

A) Pericardium

B) Veins

C) Tissue 

D) None of these

89. In between the walls of the membrane, a fluid is present which _____ the heart during its beating.

A) Lubricates

B) Loosen

C) Dry

D) None  of these

90. The heart consists of _______ chambers.

A) Four

B) Three

C) Two

D) Five

91. Arteries are ______ in size then the ventricles.

A) Smaller

B) Large

C) Equal 

D) None  of these

92. The right side of heart receives ________ blood from different parts of the body.

A) Deoxygenated blood

B) Oxygenated blood

C) Both of them

D) None of these

93. The left side of the heart receives _________ blood from the lungs and pumps it to the rest of the body.

A) Deoxygenated blood

B) Oxygenated blood

C) Both of them

D) None of these

94. _______ are blood vessels, which carry blood away from the heart to the other parts of the body.

A) Arteries

B) Veins

C) Capillaries

D) None of these

95. The arteries carry blood _____ with nutrients, food and oxygen.

A) Rich

B) Poor

C) Average 

D) None of these

96. All arteries carry oxygenated blood to different part of the body, except the _________ which carries deoxygenated blood from the heart to the lung.

A) Pulmonary arteries

B) Capillaries

C) Pulmonary veins

D) None of these

97. Arteries divide and re-divided to form narrow and thinner walled blood vessels called _______.

A) Capillaries

B) Atrium

C) Veins

D) None of them

98. Exchange of materials between the blood and tissue occur through the walls of the _________.

A) Capillaries

B) Atrium

C) Veins

D) None of them

99. _________ are vessels that take the blood carrying waste materials and carbon dioxide from the capillaries to the heart.

A) Capillaries

B) Atrium

C) Veins

D) None of these

100. All veins carry deoxygenated blood to the heart except the ________ which carries oxygenated blood from the lung to the heart.

A) Pulmonary veins

B) Pulmonary arteries

C) Capillaries

D) None  of these