[ Cardiology Services ]
The structure that prevents the backflow of blood in the heart is known as the____________.
A. septum
B. mediastinum
C. valve
Random Topics:
ConditionalSubject Verb Agreement and Coordinating ConjunctionsSecond ConditionalWas & Were QuestionsAuxiliary Verbs & Question TagsPersonal Pronouns and VerbGerunds as Objects of PrepositionsMix-TensesGrammar - Capitalization and Possessive NounsVocabulary Spelling GrammarOther quiz:
Phrasal Verb › ViewThe elevator is not running today. It is ________ order.
A. to
B. out
C. out of
D. in
Grammar › View
The ………. at the stadium started cheering enthusiastically when the old football legend walked onto the field.
A. viewers
B. audience
C. onlookers
D. spectators
It ____ snoweda lot this winter.
A. have
B. has
Grammar › View
Identify the part of speech of the underlined word.
The best breakfast in town!
___
A. Noun
B. Pronoun
C. Verb
D. Adverb
E. Adjective