Structure that prevents blood from flowing backwards in the circulatory system
A. Atrium
B. Vein
C. Ventricle
D. Valve
Select your answer:
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The Cell Cycle & Cancer Endodontic Surgery Neuron Structure Healthy Lifestyle Foot Orthosis Vocab Pathology Inflammation Disabilities The Circulatory System The Cardiovascular System OCR A-level Deficiency Disease Hearing Impairment Carbohydrate Metabolism Limitation of Senses Ecology & Organisms NeuroanatomyOther quiz:
Dyslexia › ViewChoose the answer that is a true statement.
A. A child can have both dyslexia and autism
B. Dyslexia has nothing to do with vision, hearing, or IQ.
C. 1 in 8 people have dyslexia.
D. Dyslexia is the least common learning disability.
Bacteria & Viruses › View
What happens after the second time you are exposed to a pathogen?
A. The body will not be able to fight off the pathogen quickly, because it knows how to get into the body easier.
B. The body’s immune system will react the same was as it did during the first exposure.
C. The body can only be exposed to a pathogen a second time if you do not have a vaccine.
D. The body will know how to fight off the pathogen quickly, because memory cells have been created after the first encounter.