Biology Notes for Class 9 Chapter 9

World heart Day is held on ________

Transpiration from plant surface takes place through__________

In the embryonic and faetal life, red blood cells are formed in __________

Average life span of platelets __________

When does our heart takes rest?

During atrial systole _________

The blood cells which do not contain pigments and are colourles ________

Celiac artery and superior mesenteric artery supply blood to _________

In which of the following blood vessels, the blood pressure is low?

Universal blood recipients are __________

Which one is an agranulocyte?

In persons with blood group O ___________

Average Number of red blood cells in a cubic millimeter of blood ______

In most plants, food is transported in the form of __________

In humid, air the rate of transpiration is _____________

As aorta passes down through thorax, it becomes ________

Which organ belongs to circulatory system?

The opening between left atrium and left ventricle is guarded by a valve called _________

A person with AB blood group can donated to______________

Percentage of water in plasma is ________

The outermost layer of the root____________

Which blood cells are the most numerous in healthy human blood?

Which part of plant is responsible for transporting food?

The blood cells which help in blood clotting _________

Atherosclerosis is commonly referred to as a ______

The average number of leukocytes in one cubic millimeter of blood ______

Universal blood donors are ______________

“Lubb-dubb” can be heard with the help of _________

Percentage of plasma in blood is ____________

Arteriosclerosis is a general term describing __________

Gonadal arteries supply blood to _________

The largest and strongest chamber in heart is_______

In one heartbeat, diastole remains about second _________

The alternating contraction and relaxation of heart chambers _________

Which of the following blood vessels have valves to prevent back flow of blood?

Each external iliac becomes femoral artery in upper thigh and gives branches to ______

In normal adults, the mass of heart is ________

Roughly how much of water that enters a plant is lost via transpiration?

Transpiration rate depends upon ___________

A person having blood group O can receive blood from ___________

According to the pressure-flow mechanism, the actual force behind the movement of food in phloem_______

Hepatic artery supplies blood to _________

Angina pectoris means_______

Total number of blood group systems recognized by the International Society of Blood Transfusion ________

Which blood Group contains Antigen A?

Uncontrolled production of defective white blood cells _________

Average life span of erythrocytes __________

Heart attack may be caused by blood clot in ________

Which rate of transpiration doubles with every rise of temperature?

Renal arteries supply blood to___________

Average human heart beat per minute ___________

These are smallest blood vessels __________

ABO blood group system was discovered by __________

Who discovered the pathway of blood circulation?

The type of valve present at the base of pulmonary trunk _________

The temperature range at which transpiration stops ___________

Percentage of cells or cell like bodies in blood ___________

Number of thrombocytes (Platelets) in one cubic millimeter of blood is _______

When fibrinogen makes blood clot it separates from blood and the remainder is called_____

The roots and root hairs absorb water from soil by___________

Through which blood vessels the materials are exchanged between the blood and the surrounding tissues?

Intercostal arteries supply blood to _________

ll veins coming from stomach, spleen, Pancreas and Intestine drain into ____

The average volume of blood in adult human’s body is __________

The pumping action of heart was discovered by _______

The normal pH of Human blood is ___________

Right and left common iliac veins join to form__________

The opening between right atrium and right ventricle is guarded by a valve called _______

William Harvey was born in _________

The blood pressure in arteries is ______________

Different veins from head, shoulders, and arms joined together and form ____

Which of the following prevents blood clotting?

A person having blood group B can donate blood to ____________

Which of the following is a genetic problem due to mutations in the gene of hemoglobin?

The most common symptom of myocardial infarction is _______

What is the actual universal donor blood group?

The tissue layer that is common in all types of blood vessels _________

Antigens are present on the surface of ________

The blood vessels that carry blood away from heart _________

The world celebrates the International Thalassemia Day on ________

The third part of blood circulatory system __________

A molecule that can stimulate an immune response __________

Karl Landsteiner discovered the Rh-blood group system in _________

If a thrombus dislodges and becomes free floating, it is called ________

Which cell play role in body’s defence?

William Harvey died in _______

Blood clotting protein ___________