Activity 2 Directions: Read the statements carefully. Analyze whether the statements fit o a description relevant to Gas Exchange and Internal Transport System. Please put a check mark (/) if you agree and a cross mark (x) if you disagree in each of the statements indicated below. I Agree Statements I Disagree 1. Oxygen is a vital element for metabolism. 2. Gas exchange is not important in animals. 3. Blood is a specialized body fluid. 4. Erythrocytes are also known as 'red blood cells". 5. Heart is a muscular structure that contracts in a rhythmic pattern to pump blood.​