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Questions and Answers
What is the main purpose of the circulatory system in animals?
What is the main purpose of the circulatory system in animals?
- To transport respiratory gases, nutrients, metabolic wastes, and hormones (correct)
- To provide structural support and protection for internal organs
- To maintain homeostasis and regulate body temperature
- To facilitate muscle contractions and movement
Why is a circulatory system necessary in larger animals?
Why is a circulatory system necessary in larger animals?
- To facilitate muscle contractions and movement
- To maintain homeostasis and regulate body temperature
- To provide structural support and protection for internal organs
- Because materials cannot be transported within the body by simple diffusion in larger animals (correct)
Which of the following is NOT a function of the circulatory system in animals?
Which of the following is NOT a function of the circulatory system in animals?
- Regulation of body temperature (correct)
- Production of urine
- Transport of respiratory gases
- Transport of absorbed nutrients from the digestive system to other tissues
In small animals, why can materials be transported within the body by simple diffusion?
In small animals, why can materials be transported within the body by simple diffusion?
What is the approximate time taken for a glucose molecule to diffuse 1 meter?
What is the approximate time taken for a glucose molecule to diffuse 1 meter?
Which of the following does NOT play a role in why animals require a circulatory system?
Which of the following does NOT play a role in why animals require a circulatory system?
What is the main purpose of circulatory systems?
What is the main purpose of circulatory systems?
Which organ is responsible for forcing and moving fluid through the body in the circulatory system?
Which organ is responsible for forcing and moving fluid through the body in the circulatory system?
What do arteries do in the circulatory system?
What do arteries do in the circulatory system?
What is responsible for blood circulation through the body as a result of rhythmic contractions?
What is responsible for blood circulation through the body as a result of rhythmic contractions?
Which mechanism contributes to generating blood flow in the circulatory system?
Which mechanism contributes to generating blood flow in the circulatory system?
What is the central circulation point in the circulatory system?
What is the central circulation point in the circulatory system?
What is responsible for returning blood from tissues to the heart?
What is responsible for returning blood from tissues to the heart?
What facilitates transfer of materials between blood and tissues in the circulatory system?
What facilitates transfer of materials between blood and tissues in the circulatory system?
What is a common basic plan with similar functions in animals?
What is a common basic plan with similar functions in animals?
What differs among animals in terms of generating blood flow?
What differs among animals in terms of generating blood flow?
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Study Notes
Circulatory System in Animals
- The main purpose of the circulatory system is to transport materials and oxygen throughout the body and remove waste products.
Necessity of Circulatory System
- A circulatory system is necessary in larger animals because diffusion is not sufficient to transport materials over long distances.
- In small animals, materials can be transported within the body by simple diffusion because the distance is shorter.
Functions of Circulatory System
- The circulatory system does not function to digest food.
- The main purpose of circulatory systems is to transport materials and oxygen throughout the body and remove waste products.
Heart and Blood Circulation
- The heart is responsible for forcing and moving fluid through the body in the circulatory system.
- Arteries carry oxygenated blood away from the heart to the rest of the body.
- The heart is responsible for blood circulation through the body as a result of rhythmic contractions.
- The mechanism of rhythmic contractions contributes to generating blood flow in the circulatory system.
Blood Flow and Return
- The heart is the central circulation point in the circulatory system.
- Veins are responsible for returning blood from tissues to the heart.
- Capillaries facilitate the transfer of materials between blood and tissues in the circulatory system.
Universality of Circulatory System
- The circulatory system is a common basic plan with similar functions in animals.
- What differs among animals is the mechanism of generating blood flow.
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