A.External jugular, carotid and coronary veins
B.External jugular, internal jugular veins only
C.external jugular, internal jugular and sub-clavian veins
D.External jugular, innominate and sub-clavian veins
A.Two precavals
B.One postcaval
C.All of these
D.None of these
A.Posterior intercostals
B.Dorsal body wall
C.Both of these parts
D.None of these parts
A.Sinus venosus
B.Pulmonary veins
C.Precavals
D.Precavals and postcavals
A.Rich amount of nutrients, oxygen, CO2 and metaboliic wastes
B.Negligible amount of nutrients, oxygen, CO2 and metabolic wastes
C.Negligible amount of nutrients and oxygen but abundant CO2 and metabolic wastes
D.Abundant nutrients and oxygen but negligible amount of CO2 and metabolic wastes
A.Making functioning of valve more effective
B.Checking relaxation of ventricular walls during contraction of auricles
C.Protecting eversion of atrioventricular valve towards auricles by pressure of blood in ventricles
D.None of these functions
A.Kidney
B.Brain
C.Liver
D.Pancreas
A.Aurricles
B.Ventricle
C.Conus arteriosus
D.None of these
A.Pleura
B.Mediastinum
C.Diaphragm
D.None of these
A.Mitral valve
B.4 chambers
C.Two aortae
D.Sinus venosus
