Vocabulary
atrioventricular (AV) valves Valves that stop blood from moving from the ventricles
back into the atria.
atrium One of the two small, thin-walled chambers on the top of the heart that blood first
enters.
coronary circulation The blood supply that feeds the heart.
semilunar (SL) valves Found in the arteries leaving the heart; prevents blood flowing
back from the arteries into the ventricles.
ventricle One of the two muscular V-shaped chambers that pump blood out of the heart.
Points to Consider
- Identify how the different components of the blood have very different roles in the
cardiovascular system. - Consider how diet can affect the oxygen-carrying ability of blood.
18.3 Lesson 18.3: Blood
Lesson Objectives
- List the components of blood.
- Identify three functions of blood.
- Name the oxygen-carrying protein found in red blood cells.
- Identify the main function of white blood cells.
- Describe the importance of the ABO blood system.
- Identify three blood disorders or diseases.
Check Your Understanding
- What is the main function of the blood?
- What is the role of oxygen in aerobic (cellular) respiration?