Flashcards in Circulatory system Deck (35):
What are red blood cells also called?
What are white blood cells also called?
What are blood platelets also called?
Why are red blood cells small?
So that they can travel through very fine capillaries in the the body
What is the shape of red blood cells?
Disc like biconcave, flat in the centre and thick and rounded at the periphery
Why are erythrocytes concave?
Concavity on both sides increases surface area for absorption of oxygen
How much RBC does an adult male (female) have?
Male: 5 Mn/cubic mm
Female: 4.5 Mn/ cubic mm
Give the technical term for the fluid portion of blood .
Plasma is the technical term for the fluid portion of the blood.
The mineral element essential for the clotting of the blood
Calcium is the mineral element essential for the clotting of the blood.
Write down the difference between the following pairs as indicated within the brackets .Erythrocytes and Leucocytes (function)
Erythrocytes transport respiratory gases.
Leucocytes produce antibodies and protect the body against from disease causing germs.
The process by which white blood cells engulf harmful microbes
Phagocytosis is the process by which WBC’s engulf harmful microbes .
The iron containing pigment in erythrocytes .
Name the structure responsible for the transport of oxygen to the cells of the human body
Red blood cells transport oxygen to the cell of the human body.
The blood vessel that begins and ends in capillaries is the ...........
Hepatic portal vein is the blood vessel that begins and end in capillaries .
Give one point difference red blood corpuscles and white blood corpuscles
These are originated in the bone marrow of a long bone
These are originated in the lymph node
State whether it is true or false. Also correct the statement.
Platelets which disintegrate in the injured tissue cells release prothrombin.
False .Platelets which disintegrates in the injured tissue cells release thrombokinase .
The chief function of lymph nodes in mammals is to
1) produce WBC’s
3) destroy old RBC’s
Lymph nodes in mammals produce WBC’s
The protective covering of the heart.
State the exact location of the tricuspid valve.
Tricuspid valve is found between the right auricle and the left ventricle
Give reason :
The wall of ventricles is thicker than auricles
Ventricles have thicker walls than auricles because they are meant to pump blood with pressure to reach blood to larger distances
Briefly explain pulse.
Pulse is a wave pressure of blood passing through the arteries as it is pumped out of the heart
Why are veins provided with valves ?
Veins are provided with valves because the blood in them flow at low pressure and these prevent the back flow of the blood .
Pulse wave is mainly caused by .…………
Systole of the left ventricle
The location of pulmonary semi lunar valve
They are located at the base of pulmonary trunk.
Name the phase of cardiac cycle in which the auricles contract.
Auricular systole is phase of cardiac cycle in which auricles contract .
Give the exact location for mitral valve .
Mitral valve is found between the left auricle and the left ventrical
State the main function of coronary artery.
Coronary artery supplies oxygenated blood to the walls of heart.
Name the phase of the cardiac cycle in which the ventricles relax.
Ventricular diastole is the phase of cardiac cycle in which the ventricles relax
Give the exact location and one function of chordae tendinae
1) It is found at the right ventricle .
2) Its main function is to keep the cuspid valves in position .
Give a biological reasons for the blood in the arteries flows in spurts .
Blood in artery flows in spurts because flow of blood is under pressure and also because arteries have elastic walls.
Name the blood vessel which carries oxygenated blood to the liver.
Name the phase of contraction of the chambers of the heart.
From where to where do the following blood vessels carry blood ?
1) hepatic vein
2) hepatic portal vein
1) hepatic vein carries blood from liver to posterior vena cava
2) hepatic portal vein carries blood from intestine to liver.
Name the protective covering of the heart .