Topic: Body Transport System Subtopic: The movement of blood through the heart
What makes heart sound like lub?
Answer: The contraction of ventricles is so strong that the blood flows with power turning the chamber valves close, This makes the 'lub' sound.
- What is major component of respiration?
- What happens if excess lactic acid is produced?
- What is absorbed in large intestine?
- What is digestive system?
- How does air enter our lungs?
- What are carbohydrates and functions?