Final answer:
In biology, substances can be absorbed into the bloodstream rather than onto an epithelial surface through capillaries in various tissues such as the lungs and intestines. This is an efficient way for substances to be transported throughout the body.
Step-by-step explanation:
In biology, substances that are absorbed into the bloodstream rather than onto an epithelial surface are usually in the form of gases or soluble molecules. This process occurs through capillaries in the walls of the intestines, lungs, or other tissues.
For example, in the lungs, oxygen from the air enters the bloodstream through the thin walls of the capillaries. In the intestines, nutrients such as glucose and amino acids are absorbed into the bloodstream.
This mechanism of absorption directly into the bloodstream is a efficient way for substances to be transported throughout the body, as the bloodstream reaches every part of the body. Therefore, the statement is true.
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