Biology and Medicine

Clues in this puzzle

Across

• The basic structural and functional unit of all living organisms (4)
• A substance used to stimulate the production of antibodies (7)
• A rigid organ that constitutes part of the skeleton (4)
• The internal organ in which the major part of digestion occurs (7)
• An abnormally high body temperature (5)
• A person receiving medical treatment (7)
• A fiber that transmits impulses of sensation to the brain (5)

Down

• The organ of soft nervous tissue contained in the skull (5)
• An optical instrument used for viewing very small objects (10)
• Either of the two breathing organs in the chest (4)
• Microscopic single-celled organisms that lack a distinct nucleus (8)
• The gas essential for respiration that we breathe in (6)
• The thin layer of tissue forming the natural outer covering of the body (4)
• A blood vessel that carries blood back to the heart (4)

More Biology and Medicine crosswords

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