Understanding Double Circulation

What is double circulation in the human body?

• A system that does not involve the lungs

• Blood flow that only goes to the digestive system

• Double circulation is the system of blood flow in humans consisting of two circuits: pulmonary and systemic.

• A single circuit of blood flow in the heart

Explain the role of the heart in double circulation.

• The heart circulates blood in a single loop system.

• The heart separates oxygenated and deoxygenated blood, facilitating efficient double circulation.

• The heart has no role in separating blood types.

• The heart pumps only deoxygenated blood to the lungs.

How does oxygenated blood differ from deoxygenated blood?

• Oxygenated blood is blue and deoxygenated blood is red.

• Oxygenated blood contains more oxygen and is bright red, while deoxygenated blood contains less oxygen and is darker red.

• Oxygenated blood is produced in the liver while deoxygenated blood is produced in the lungs.

• Oxygenated blood is thicker than deoxygenated blood.

Describe the pathway of blood in the systemic circulation.

• Blood moves from the aorta directly to the capillaries, bypassing the veins and right atrium.

• Blood flows from the right ventricle to the aorta, then to arteries, arterioles, capillaries, venules, veins, and finally to the left atrium.

• Blood circulates from the left atrium to the pulmonary artery, then to the lungs, and back to the left ventricle.

• Blood flows from the left ventricle to the aorta, then to arteries, arterioles, capillaries, venules, veins, and finally to the right atrium.

What is the significance of the pulmonary circulation?

• Pulmonary circulation is significant for oxygenating blood and removing carbon dioxide.

• It helps in digestion of food.

• It is responsible for nutrient absorption.

• It circulates hormones throughout the body.

Identify the main components involved in double circulation.

• Lungs, liver, and arteries

• Heart, stomach, and veins

• Heart, kidneys, and blood vessels

• The main components involved in double circulation are the heart, lungs, and blood vessels.

How does the structure of the heart support double circulation?

• The heart pumps blood in a single loop to the lungs and body.

• The heart has only two chambers for efficient blood flow.

• The heart's valves prevent blood from mixing, but do not support double circulation.

• The heart's four chambers separate oxygenated and deoxygenated blood, supporting double circulation.

What happens to blood pressure during double circulation?

• Blood pressure is lower in systemic circulation than in pulmonary circulation.

• Blood pressure is higher in systemic circulation than in pulmonary circulation.

• Blood pressure fluctuates randomly during double circulation.

• Blood pressure is the same in both circulations.

Illustrate the flow of blood through the heart chambers.

• Lungs → Right ventricle → Left atrium → Right atrium → Body → Left ventricle

• Right atrium → Right ventricle → Lungs → Left atrium → Left ventricle → Body

• Right atrium → Left ventricle → Lungs → Right ventricle → Left atrium → Body

• Left atrium → Right atrium → Body → Lungs → Right ventricle → Left ventricle

What is the role of arteries and veins in double circulation?

• Arteries return deoxygenated blood to the heart, and veins transport oxygenated blood away from the heart.

• Arteries transport oxygenated blood away from the heart, and veins return deoxygenated blood to the heart in double circulation.

• Arteries and veins both carry oxygenated blood to the lungs for oxygenation.

• Veins transport blood from the lungs to the heart, while arteries carry blood from the heart to the body.