10 Questions
What is the function of the circulatory system mentioned in the text?
Transporting oxygen, nutrients, and hormones throughout the body
What is the characteristic of an open circulatory system according to the text?
Blood is not confined to vessels and flows directly to body cavities
What is the function of hemolymph in invertebrates with an open circulatory system?
Circulatory fluid that fills body cavities and bathes body tissues
What is the advantage of a closed circulatory system mentioned in the text?
Blood flows within a network of vessels, like arteries and veins
Why is an open circulatory system considered ideal for organisms with low metabolic rates?
It operates at low pressure, suitable for organisms with low metabolic rates
What is the role of the circulatory system in the body?
The circulatory system transports oxygen, nutrients, hormones, and waste products throughout the body. It also helps regulate body temperature and plays a role in defending against infections.
How does material exchange occur in simple multicellular animals like sponges?
In simple multicellular animals like sponges, material exchange occurs through diffusion directly across the cell membrane, as they have no circulatory system.
What is hemolymph, and how does it function in organisms with an open circulatory system?
Hemolymph is the circulatory fluid (blood and tissue fluid) that fills body cavities in organisms with an open circulatory system. It is pumped through vessels into spongy chambers called sinuses, where it bathes body tissues before getting collected and returned back to the heart.
Explain the difference between an open circulatory system and a closed circulatory system.
In an open circulatory system, blood is not confined to vessels and flows directly to body cavities, while in a closed circulatory system, blood flows within a network of vessels like arteries and veins.
Why is a low pressure circulatory system considered ideal for organisms with low metabolic rates?
A low pressure circulatory system is ideal for organisms with low metabolic rates because it allows for efficient nutrient exchange and circulation without requiring a high pressure pumping system.
Test your knowledge on the circulatory system in living organisms with this quiz. Explore how the circulatory system transports essential substances and regulates body temperature. Learn about the different types of circulatory systems, from simple multicellular animals to invertebrates.
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