pulmonary veins
major difference is of pulmonary veins. If we compare the structure of heart the difference lies in the presence of single ventricles.
Grasshoppers have an open circulatory system, and worms have a closed circulatory system. There you go. :)
drow the three major parst of circulatory system
... The major organs of the circulatory system are the heart, blood, and blood vessels.
veins..
Artery.
Heart
The heart and circulatory system.
The three major parts of the circulatory system are the heart, the blood, and the blood vessels.
The major organ of the circulatory system is the heart. The three parts that are involved with the circulatory system are the blood, the heart, and the vessels.
The three major organs of the circulatory system are: The Heart, The Brain and The Lungs:
Help please!! :( right now PLEASE