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Questions and Answers
What is the function of the circulatory system in animals?
What is the function of the circulatory system in animals?
- Generating energy for cellular activities
- Providing structural support for the body
- Producing hormones for regulating body functions
- Transporting nutrients and oxygen to cells and removing waste products (correct)
What is the primary role of the respiratory system in animals?
What is the primary role of the respiratory system in animals?
- Regulating body temperature
- Filtering out toxins from the bloodstream
- Breaking down food into nutrients for cellular use
- Facilitating the exchange of oxygen and carbon dioxide between the body and the environment (correct)
What is the purpose of the digestive system in animals?
What is the purpose of the digestive system in animals?
- Breaking down food into nutrients for absorption by the body (correct)
- Synthesizing proteins for tissue repair
- Generating oxygen for cellular respiration
- Transporting hormones to various organs
What is the function of the excretory system in animals?
What is the function of the excretory system in animals?
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What is the purpose of interstitial fluid in the body?
What is the purpose of interstitial fluid in the body?
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Study Notes
Animal Structure and Function
- Animal form and function are correlated at all levels of organization, meaning that an animal's size and shape affect how it interacts with its environment.
Body Plans and Size
- Different animal body plans have evolved and are determined by the genome.
- The ability to perform certain actions depends on an animal's shape, size, and environment.
Environmental Constraints
- Physical laws impose constraints on animal size and shape.
Exchange with the Environment
- An animal's size and shape directly affect how it exchanges energy and materials with its surroundings.
- In single-celled organisms, exchange occurs through the cell membrane (0.15 mm).
- In simple multicellular organisms with a sac body plan, the body walls are only two cells thick, facilitating diffusion of materials (1.5 mm).
Complexity and Internal Surfaces
- More complex organisms have highly folded internal surfaces for exchanging materials.
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