24 Questions
Which type of circulatory system is characterized by the presence of a heart that pumps fluid throughout the body?
Closed Circulatory System
What is the main function of the heart in a closed circulatory system?
To pump oxygen-rich blood to the body
Which type of circulatory system is found in insects and mollusks?
Open Circulatory System
What is the primary function of the gastrovascular cavity in simple animals?
To digest food
Which circulatory adaptation is found in earthworms?
Closed circulatory system for oxygen transport
What is the main difference between open and closed circulatory systems?
The presence of blood vessels
Which of the following animals has a circulatory system that is most similar to humans?
Fish
What is the primary function of the circulatory system in animals?
To transport oxygen and nutrients
Which type of circulatory system is characterized by the absence of a distinct heart?
Open Circulatory System
What is the main advantage of having a circulatory system over diffusion?
Efficient transport of materials
Which of the following organisms is likely to have a closed circulatory system?
Horse
What is the primary function of a circulatory system?
Transport and exchange of materials
What is the term for the cavity found in simpler organisms, such as sea jellies, where digestion and circulation occur?
Gastrovascular Cavity
What is the main advantage of having a heart in a circulatory system?
Efficient pumping of blood
Which of the following is an example of a circulatory adaptation in simpler organisms?
Use of diffusion for material transport
What is the term for the study of the structure, function, and variation of living organisms?
Biology
What is the primary function of the heart in an open circulatory system?
To facilitate the exchange of materials between hemolymph and body cells
What is the difference between the fluid in open and closed circulatory systems?
Hemolymph is found in open systems, while blood is found in closed systems
Which group of organisms has a closed circulatory system?
Members of Phylum Annelida, Cephalopoda, and all vertebrates
What is the function of the valves in the pores of the heart in open circulatory systems?
To prevent the backflow of hemolymph when the heart contracts
What is the term for the fluid that surrounds the organs in open circulatory systems?
Hemolymph
What is the purpose of the heart in closed circulatory systems?
To pump blood into blood vessels
What is the term for the cavity in simple animals where digestion and absorption of nutrients occur?
Gastrovascular cavity
What is the main advantage of closed circulatory systems over open circulatory systems?
Closed systems are more efficient in delivering oxygen and nutrients to cells
Study Notes
Circulatory Systems
- In open circulatory systems, the heart contracts to allow hemolymph to traverse the interconnected sinuses surrounding the organs, facilitating exchange of materials between the hemolymph and body cells.
- During heart relaxation, the hemolymph is drawn back in through pores equipped with valves that close when the heart contracts.
Closed Circulatory Systems
- In closed circulatory systems, blood is distinct from interstitial fluid.
- The heart pumps blood into blood vessels that branch into smaller vessels, extending to other organs.
- Members of Phylum Annelida, Cephalopoda, and all vertebrates have closed circulatory systems.
Comparison of Circulatory Systems
- Different types of circulatory systems have advantages and disadvantages.
- Open circulatory systems have a cardiovascular cavity, while closed circulatory systems have a heart or hearts that pump blood into blood vessels.
Organisms with Different Circulatory Systems
- Sea jelly, spider, fish, frog, alligator, and horse have different circulatory systems, with varying features and advantages.
- Simpler organisms use diffusion to gather necessary materials, while more complex ones evolved to have a circulatory system or vascular system that facilitates transport and exchange of materials.
This quiz covers the comparison of open and closed circulatory systems in different organisms. Learn about the important parts, general path, and advantages of each system.
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