Question

Name the following
(i) Structure where the wave of contraction originates in heart to begin heart
beat
..................................................................................................................
(ii) Structure connecting arteries with the veins
..................................................................................................................
(iii) Blood vessel that brings oxygenated blood from the lungs to the heart
..................................................................................................................
(iv) The blood vessel which collects and brings deoxygenated blood from brain
and shoulder region to the heart .............................................................

Answer 1

Answer:

i)SAN- synoatriealnode

iii) pulmonary veins

iv) Superior vena cava

Answer 2

Explanation:

(i) Structure where the wave of contraction originates in heart to begin heart beat - SA Node

(ii) Structure connecting arteries with the veins - Capillaries

(iii) Blood vessel that brings oxygenated blood from the lungs to the heart - Pulmonary veins

(iv) The blood vessel which collects and brings deoxygenated blood from brain  and shoulder region to the heart - Venacava