ROUND 2 SPEED RACE
ONE EIGHTH CONTEST 2026
Prempeh College - 66 points
West Africa SHS - 30 points
Kumasi Girls’ SHS - 19 points
ONE EIGHTH CONTEST 2026
Keta SHTS - 56 points
Kadjebi-Asato SHS - 28 points
Anum Presby SHS - 19 points
ONE EIGHTH CONTEST 2026
Ghana National College - 38 points
St. Monica’s SHS - 22 points
Presby SHS, Suhum - 16 points
QUESTION
Name the structure that acts as a barrier and prevents the mixing of oxygenated and deoxygenated blood in the human heart.
ANSWER: The (cardiac) septum
EXPLANATION
It's a solid muscular wall dividing the heart into left and right sides — the interatrial septum separates the two atria, and the interventricular septum separates the two ventricles — keeping oxygenated blood on the left side separate from deoxygenated blood on the right.
PRACTICE QUESTIONS
1. Name the four chambers of the human heart.
ANSWER: Two atria and two ventricles.
2. What type of muscle forms the heart?
ANSWER: Cardiac muscle.
3. Which vessels supply the heart muscle with blood?
ANSWER: The coronary arteries.
4. Name the valves between the atria and the ventricles.
ANSWER: The tricuspid valve on the right and the bicuspid (mitral) valve on the left.
5. Name the two semilunar valves.
ANSWER: The pulmonary valve and the aortic valve.
6. What are the chordae tendineae?
ANSWER: Tendons that stop the atrioventricular valves from turning inside out.
7. Which structure is the natural pacemaker of the heart?
ANSWER: The sinoatrial (SA) node.
8. What causes the sounds of the heartbeat?
ANSWER: The closing of the heart valves.
9. Which chamber has the thickest wall?
ANSWER: The left ventricle.
10. What is double circulation?
ANSWER: Blood passes through the heart twice in each complete circuit of the body.
11. What is the pericardium?
ANSWER: The membrane that surrounds the heart.
12. How is cardiac output calculated?
ANSWER: Stroke volume multiplied by heart rate.