The major difference between the vascular system of a human and a starfish is that humans have cardio vascular system and starfish have water vascular system.

effect of serotonin in vascular system

All angiosperms are vascular

Vascular plant grow faster because the structure of it allow it to get the nutrient and water it needs faster then non-vascular.

The vascular system is the system the plant use to transport water and nutrient. It has 2 pipe called the Xylem for water and Phloem for other nutrients.

Snakes have a circulatory system, sometimes called the vascular system.