an animal organ which carry out gas exchange. They contain squamous epithelium tissue (in the alveoli) and ciliated epithelium tissue (in the bronchi etc.). They also have elastic connective tissue and vascular tissue (in the blood vessels).
A) capillaries
B) connective tissue
C) alveoli
The leaf
a plant organ which carries out gas exchange and photosynthesis. It contains palisade tissue, as well as epidermal tissue (to prevent water loss from the leaf), and xylem and phloem tissues in the veins.
A) upper epidermis
B) palisade mesophyll
C) xylem
D) lower epidermis
E) phloem
organ
a group of different tissues working together to do a specific job
