When We Say an Animal Has an "Open Circulatory System

question 14

Multiple Choice

When we say an animal has an "open circulatory system," this means that:

• A)a small amount of blood may leak out of vessels.
• B)blood flows out of vessels and into spaces or sinuses.
• C)the animal has a single-chambered heart, so blood mixes from all areas.
• D)there are no vessels-blood simply fills all spaces inside the coelom.
• E)movement of the animal is solely responsible for moving circulatory fluid.

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Definitions:

Chemicals

Substances with a distinct molecular composition that are used in or produced by chemical processes.

Systematic

Refers to a method or process being carried out using a fixed plan or system, in a thorough and organized manner.

Formal Operational Thinking

The stage in Jean Piaget's theory of cognitive development where individuals gain the ability to think abstractly, logically, and systematically.

Logical Necessity

A condition or proposition that cannot be otherwise because of the inherent nature of logic or rationality.