The correct pathway of blood in circulatory system is

(1) Auricles -> Ventricles -> Arteries -> Veins
(2) Ventricles -> Auricles -> Veins -> Arteries
(3) Ventricles -> Veins -> Arteries -> Auricles
(4) Veins -> Ventricles -> Arteries -> Auricles

Break down of pyruvate to give carbon dioxide, water and energy takes place in
(1) Cytoplasm (2) Mitochondria (3) Chloroplast (4) Nucleus

_________ smoothens bone surface at joints and is also present in the nose, ear, trachea & larynx.

(1) Tendons
(2) Ligament
(3) Areolar tissues
(4) Cartilage

Which one of the following is attached to the right ventricle?

(1) Pulmonary artery 
(2) Pulmonary vein
(3) Superior venacava 
(4) Inferior venacava

'Edema' is related to
(1) Digestive system (2) Excretory system (3) Lymphatic system (4) Arterial system