Biology: Circulatory Systems

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Questions and Answers

Which type of circulatory system is characterized by the presence of a heart that pumps fluid throughout the body?

Open Circulatory System
Closed Circulatory System (correct)
Gastrovascular Cavity
None of the above

What is the main function of the heart in a closed circulatory system?

To filter waste from the blood
To store nutrients
To pump oxygen-rich blood to the body (correct)
To regulate body temperature

Which type of circulatory system is found in insects and mollusks?

Gastrovascular Cavity
Closed Circulatory System
Both A and B
Open Circulatory System (correct)

What is the primary function of the gastrovascular cavity in simple animals?

To digest food (D) Signup and view all the answers

Which circulatory adaptation is found in earthworms?

Closed circulatory system for oxygen transport (D) Signup and view all the answers

What is the main difference between open and closed circulatory systems?

The presence of blood vessels (D) Signup and view all the answers

Which of the following animals has a circulatory system that is most similar to humans?

Fish (C) Signup and view all the answers

What is the primary function of the circulatory system in animals?

To transport oxygen and nutrients (A) Signup and view all the answers

Which type of circulatory system is characterized by the absence of a distinct heart?

Open Circulatory System (C) Signup and view all the answers

What is the main advantage of having a circulatory system over diffusion?

Efficient transport of materials (B) Signup and view all the answers

Which of the following organisms is likely to have a closed circulatory system?

Horse (C) Signup and view all the answers

What is the primary function of a circulatory system?

Transport and exchange of materials (C) Signup and view all the answers

What is the term for the cavity found in simpler organisms, such as sea jellies, where digestion and circulation occur?

Gastrovascular Cavity (B) Signup and view all the answers

What is the main advantage of having a heart in a circulatory system?

Efficient pumping of blood (D) Signup and view all the answers

Which of the following is an example of a circulatory adaptation in simpler organisms?

Use of diffusion for material transport (C) Signup and view all the answers

What is the term for the study of the structure, function, and variation of living organisms?

Biology (A) Signup and view all the answers

What is the primary function of the heart in an open circulatory system?

To facilitate the exchange of materials between hemolymph and body cells (B) Signup and view all the answers

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 (B) Signup and view all the answers

Which group of organisms has a closed circulatory system?

Members of Phylum Annelida, Cephalopoda, and all vertebrates (C) Signup and view all the answers

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 (A) Signup and view all the answers

What is the term for the fluid that surrounds the organs in open circulatory systems?

Hemolymph (B) Signup and view all the answers

What is the purpose of the heart in closed circulatory systems?

To pump blood into blood vessels (B) Signup and view all the answers

What is the term for the cavity in simple animals where digestion and absorption of nutrients occur?

Gastrovascular cavity (B) Signup and view all the answers

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 (B) Signup and view all the answers

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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.

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