Body Transport System - Science Learning 4

Learn Body Transport System questions with answers. This prep guide includes questions like, which chamber is connected to which vessel?, what happens when atria are full of blood?, what happens when blood enters ventricles?, what makes heart sound like lub?, what makes heart sound like dub? and others below.

Body Transport System Learning 4

Question: Which chamber is connected to which vessel?

Answer: Both the atria are connected with veins, because the blood enters the heart from the veins and into the atria. Ventricles are connected with arteries because they have to pump the blood out of the heart and arteries carry the blood away from the blood.

Question: What happens when atria are full of blood?

Answer: When atria are full of blood, they push the blood through the valves and into the ventricles.

Question: What happens when blood enters ventricles?

Answer: When the blood enters the ventricles, more blood enters the atria, ventricles contract making the valves between the chambers close to prevent backward flow of blood into the atria. The blood is then pumped out of the semi-lunar valves located between the arteries and ventricles.

Question: 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.

Question: What makes heart sound like dub?

Answer: When the ventricles push the blood out of the heart, the semi-lunar valves open with such a force that a sound like 'dub' is created.