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Difficulty: MediumCirculatory and Transport Systems in Animals

Match each blood component or circulatory vessel in Column I with its primary physiological function or characteristic in Column II.

  • ErythrocytesTransport oxygen using hemoglobin and lack nuclei when mature in mammals
  • ThrombocytesInitiate blood clotting by releasing thromboplastin at injury sites
  • Lymphatic VesselsDrain excess interstitial fluid and return filtered fluid to the venous blood system
  • Pulmonary VeinCarry oxygenated blood from the lungs to the left atrium of the heart

Answer

Erythrocytes pair with oxygen transport via hemoglobin; Thrombocytes pair with initiating blood clotting via thromboplastin release; Lymphatic Vessels pair with draining excess interstitial tissue fluid; Pulmonary Vein pairs with carrying oxygenated blood from lungs to the left atrium.
Each transport component matches its exact anatomical and physiological role: erythrocytes transport oxygen via hemoglobin, thrombocytes initiate coagulation by releasing clotting factors, lymphatic vessels return extracellular interstitial fluid to systemic circulation, and pulmonary veins return oxygen-rich blood from the lungs into the heart's left atrium.

Step-by-Step Solution

1
Identify the biological role of red blood cells (erythrocytes).
Erythrocytes specialize in gas transport using hemoglobin and are enucleated in mature mammals.
Maximizing internal volume allows efficient binding and transport of oxygen gas.
2
Identify the function of blood platelets (thrombocytes).
Thrombocytes initiate blood coagulation at wound sites.
Disruption of platelets releases thromboplastin, converting prothrombin to thrombin.
3
Determine the role of the lymphatic system vessels.
Lymphatic capillaries absorb tissue fluid filtered out of blood capillaries and return lymph to venous blood.
This maintains fluid balance between blood tissue and extracellular space.
4
Trace the vessel returning oxygenated blood from pulmonary circuit.
Pulmonary veins carry oxygenated blood directly from alveoli capillaries back into the left atrium.
Although most veins carry deoxygenated blood, pulmonary veins carry oxygenated blood post-gas exchange.

Key Concept

Blood Cellular Composition and Vessel Functions in Mammalian Transport Systems
Estimated Time:1m 0s
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Topics

Circulatory and Transport Systems in Animals

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