Lymphatic System Review

How does the lymphatic system help maintain blood pressure?

• By increasing heart rate

• By returning leaked fluids to the blood, maintaining blood volume levels

• By producing red blood cells

• By absorbing nutrients from food

In the provided diagram, what does the color red represent?

• Deoxygenated blood in veins

• Oxygenated blood being pumped from lungs to heart to rest of the body via arteries

• Lymphatic vessels

• Blood in capillaries

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Which of the following best describes lymphatic vessels?

• Networks of drainage vessels that collect and return excess interstitial fluid to the blood

• Small organs that act as checkpoints to filter the lymph

• The protein-containing fluid that moves through blood vessels

• Organs that produce red blood cells

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Which of the following are considered lymphoid organs?

• Spleen, thymus, and tonsils

• Heart, lungs, and liver

• Kidneys, pancreas, and stomach

• Brain, spinal cord, and nerves

What is the primary function of lymphoid organs in the immune system?

• They help defend the body against pathogens

• They break down carbohydrates

• They transport oxygen in the blood

• They produce insulin

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What types of particles can lymphatic capillaries easily take in due to their permeability?

• Only water molecules

• Only oxygen and carbon dioxide

• Large particles like proteins, cell debris, pathogens, and cancer cells

• Only glucose and amino acids

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Why is the one-way system of lymphatic vessels important for the function of the lymphatic system?

• It allows lymph to circulate back and forth, mixing with blood

• It ensures that lymph only flows towards the heart, preventing backflow and aiding in the removal of waste from tissues

• It helps lymphatic capillaries absorb oxygen from blood

• It allows lymph to be stored in tissues for later use

Where do lymphatic capillaries begin, and how are they positioned relative to other structures?

• In the heart, surrounded by veins

• In the liver, next to bile ducts

• In microscopic spaces, interwoven between tissue cells and blood capillaries

• In the lungs, next to alveoli

What is the main function of collecting lymphatic vessels?

• They are similar to blood vessels and transport lymph

• They filter lymph

• They unite and drain large areas of the body

• They pump blood to the heart

Where does the thoracic duct drain lymph to?

• To the heart via the subclavian vein

• To the heart via the internal jugular vein

• To the lungs via the pulmonary vein

• To the liver via the hepatic vein