Multicellular organisms require transport systems to supply their cells and remove waste products. The heart uses blood vessels to transport these substances around the body.
Which blood vessels in the diagram carry blood away from the heart?
1 and 4
2 and 3
3 and 4
Into which chamber of the heart does blood flow from the pulmonary vein?
Which vessel carries blood from the heart to the lungs?
Which of the following shows the correct direction of blood flow through the chambers of the heart?
Which type of vessel carries blood at the highest pressure?
Which type of blood vessel contains valves?
Which of the following characteristics of red blood cells is correct?
1. They have a biconcave shape.
2. They have no nucleus.
3. They have a cell wall.
Answer 1 is correct
Answers 1 and 3 are correct
Answers 1 and 2 are correct
What is the function of white blood cells?
Carrying carbon dioxide
What happens to a pathogen during phagocytosis?
It is engulfed
It is digested
It is engulfed and digested
What type of cell produces antibodies?