1. Open circulatory system: Hemolymph flows from the heart to the hemocoel (body cavity).
2. Closed circulatory system: Blood flows in the blood vessels from the heart to body tissues.

Insects:

• Open circulatory system. 
• Have many segments of space. 
• No mixing of hemolymph content.

Fish: 

• Closed circulatory system.
• Have a two-chambered heart; atrium and ventricle.
• No mixing of oxygenated and deoxygenated blood in the heart. 

Amphibian:

• Closed circulatory system.
• Have a three-chambered heart; two atria and one ventricle.
• Mixing of oxygenated and deoxygenated blood in the ventricle.

Humans:

• Closed circulatory system.
• Have a four-chambered heart: two atria and two ventricles.
• No mixing of oxygenated and deoxygenated blood in ventricles.