1) Air enters our body trhough the a) mouse b) nose and mouth c) teeth 2) Below the lungs there is a muscle called a) lungs b) trachea c) diaphragm d) bronchi 3) The air passes through a tube called a) trachea b) bronchi c) mouth d) lungs 4) When the diaphragm relaxes.... a) air is expelled from our lungs b) air is drawn into our lungs 5) The bronchi lead to two large organs which are responsible fro breathing a) nose b) lungs c) trachea 6) It is a group of organs that perform respiration a) Circulatory system b) Female reproductive system c) Locomotor system d) Respiratory system

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