★ Living Organisms Quiz
The heart, blood vessels, kidneys, and bladder working together are best described as
A. a cell.
B. a tissue.
C. an organism.
D. a system.
Select your answer:
Topics:
Eye Histology Microorganisms, Health and Diseases Bacteria, Viruses, and Fungi Vocabulary for Organisms in Ecosystems BTEC Biological Approach Revise Anatomy Bones Cardiovascular Diseases Child Growth and Development Vet Terminology Circulatory & Respiratory Reproduction Specialties: Neurological and Geriatric Human Anatomy and Physiology - Types of Tissues DNA and Genetic Manipulation Anatomy & PhysiologyOther quiz:
Respiratory System › ViewThe main function of the respiratory system is to
A. Expel oxygen
B. Bring carbon dioxide to living cells
C. Clean and filter the blood
D. Provide a means for gas exchange
Nervous System › View
Which neurotransmitter is associated with the “fight or flight” response?
A. Dopamine
B. Serotonin
C. Epinephrine
D. Acetylcholine