Match the following: 1 Exhalation a Auricles and ventricles 2 Translocation of food b Uric acid 3 Nitrogenous waste c Stethoscope 4 Valves d C O 2 5 Heartbeat e Phloem

1. Exhalation is a process in which gaseous waste such as carbon dioxide and excess water vapour are expelled through the lungs. 2. Phloem forms long tubes for transportation of food from leaves to the other parts of the plant by a process called translocation. 3. Some other organisms such as insects, reptiles and birds excrete nitrogenous wastes in the form of uric acid. They are called uricotelic organisms. 4. The left auricle is connected to the left ventricle and the right auricle is connected to the right ventricle through small openings called valves. These cup-shaped valves allow the flow of blood in one direction only, that is, from auricles to ventricles and not back into the auricles. 5. The rhythmic contraction and relaxation of the heart is known as heartbeat. Heartbeat is felt due to closure of valves present on either sides of ventricles. Doctors listen to the sound of heartbeat using an instrument called the stethoscope. 1 Exhalation a CO2 2 Translocation of food b Phloem 3 Nitrogenous waste c Uric acid 4 Valves d Auricles and ventricles 5 Heartbeat e Stethoscope