The clotting of blood cannot take place in the absence of vitamin K.

Clumping of RBC may occur when the blood of one person is mixed with the serum or blood of another person due to antigen – antibody reaction.

The medium of plasma is basic.

Spleen destroys the worn out RBCs in the body of vertebrates.

If haemoglobin is replaced by haemocyanin, the blood will carry less oxygen.

The heart of a man is myogenic.

The mitral valve (also known as the bicuspid valve or left atrioventricular valve) is a dual-flap valve in the heart that lies between the left atrium (LA) and the left ventricle (LV).  

The heart beat is heard on the left side of the chest as aorta is present on the left side.

The phase of contraction of the heart is termed as systole.

The atrioventricular node is located on the right side of interauricular septum.