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Questions and Answers
Questions and Answers
What is the term used for the system of organs that includes the heart, blood vessels, and blood circulated throughout the body?
What is the term used for the system of organs that includes the heart, blood vessels, and blood circulated throughout the body?
- Vascular system
- Respiratory system
- Cardiovascular system (correct)
- Pulmonary system
In vertebrates, the circulatory system is described as closed, meaning:
In vertebrates, the circulatory system is described as closed, meaning:
- The blood only circulates within the heart
- The blood leaves the network of blood vessels to reach the tissues
- The blood never leaves the network of blood vessels (correct)
- The blood circulates outside the body
What components are found in blood?
What components are found in blood?
- Plasma, red blood cells, white blood cells, and platelets (correct)
- Plasma, red blood cells, hormones, and gases
- Plasma, white blood cells, platelets, and minerals
- Plasma, red blood cells, nutrients, and waste materials
Which organisms lack a circulatory system?
Which organisms lack a circulatory system?
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What is the function of the cardiovascular system?
What is the function of the cardiovascular system?
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Study Notes
Study Notes
Circulatory System
- The system of organs that includes the heart, blood vessels, and blood circulated throughout the body is referred to as the circulatory system.
Characteristics of Circulatory System in Vertebrates
- In vertebrates, the circulatory system is described as closed, meaning that the blood is confined within blood vessels and is not mixed with other fluids.
Components of Blood
- Blood consists of red blood cells, white blood cells, and platelets suspended in plasma.
Organisms Without a Circulatory System
- Some invertebrates, such as flatworms, lack a circulatory system and instead rely on diffusion to transport nutrients and oxygen to their cells.
Function of the Cardiovascular System
- The function of the cardiovascular system is to transport oxygen and nutrients to cells and remove waste products, thereby maintaining homeostasis and supporting the overall health of the organism.
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