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Soon after the coelom begins to form, a researcher injects a dye into the coelom of a deuterostome embryo. Initially, the dye should be able to flow directly into the ________.
Living Conditions
The social and environmental factors that contribute to the quality and manner of a person's daily life and wellbeing.
Stress
A physical, mental, or emotional factor that causes bodily or mental tension, often resulting from demanding circumstances.
Parasites
Organisms that live on or inside another organism (the host) and benefit at the host's expense, often causing harm.
Antigens
Substances, usually proteins, on the surface of bacteria, viruses, and other foreign substances, that trigger an immune response in the body.
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