Examlex
A circadian rhythm has a period that approximates a 12-hour cycle.
Cardiovascular System
The body's system comprising the heart and blood vessels, responsible for circulating blood and transporting nutrients and oxygen.
Carbon Monoxide
A colorless, odorless, and poisonous gas produced by the incomplete combustion of carbon-containing materials.
Tar
A dark, thick, and sticky liquid derived from coal or wood, used for waterproofing, sealing, and paving, or as a component in certain manufacturing processes.
Single-Parent Families
Single-Parent Families are families with children that are headed by a single parent as a result of divorce, death, or other circumstances.
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