Heart
How many sides are there for the heart?
Two
Blood vessels that carry blood away from the heart
Arteries
An adult has almost _____ litres of blood in the body
Five
The blood cells responsible for fighting infections
Leukocytes
The network formed during blood clotting
Fibrin
What is the function of heart?
Pumping blood to arts of the body
The smallest blood vessels in the body
Capillaries
Mention the components of blood
Plasma, Red blood cells, White blood cells and platelets
The cell fragments involved in blood clotting
Platelets
The protein in plasma that helps in blood clotting
Fibrinogen
Why is heart called a muscular pump?
The heart is made of cardiac muscles that contract and relax continuously to pump blood.
Blood vessels that usually carry deoxygenated blood
Veins
The red colour of RBCs is due to _______
Haemoglobin
The pigment that gives blood its red colour
Haemoglobin
The largest vein in the human body
Vena cava
The chamber of heart that pumps blood to the body
Ventricle
The largest artery in the human body
Aorta
The process where some types of WBCs wrap themselves around pathogens to destroy them
Phagocytosis
The liquid component of blood
Plasma
The scientific name for red blood cells
Erythrocytes
The pumping and relaxing phases of heart are called _______ and ______ respectively.
Systole and Diastole
The process of movement of oxygen through capillary walls
Diffusion
What is the rough percentage of RBCs in the blood?
41
The lower chambersof the heart
Ventricles
Why are RBCs shaped like biconcave discs?
To increase the surface area for oxygen exchange and allow RBCs to pass easily through narrow capillaries