Page 21 - 新思维科学学生用书7 样章
P. 21
1 Cells
1.4 Cells, tissues and organs
In this topic you will:
• find out about tissues, organs and organ systems in living organisms
• recognise and name human organs that are part of different organ systems.
Getting started Key words
Draw an outline of a human body. ciliated epithelium
Sketch and label each of these organs on the outline. lower epidermis
brain heart stomach intestine lungs
onion epidermis
organ
organ system
organism
palisade layer
spongy layer
tissue
upper epidermis
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