Question

77 of 110 concepts completed multiple choice question which formed element is indicated by the arrow labeled a? erythrocyte platelet monocyte leukocyte

Explanation:

To determine the formed element labeled A, we analyze the options:

• Erythrocytes are red blood cells (biconcave, red, no nucleus), but the arrow A points to small, white - like structures.
• Platelets (thrombocytes) are small, irregularly shaped cell fragments involved in blood clotting. The structure labeled A matches the appearance of platelets.
• Monocytes are a type of white blood cell (leukocyte) with a large, irregular nucleus and are larger than what is labeled A.
• Leukocytes (white blood cells) are generally larger and have distinct nuclear structures, unlike the small structures at A.

Answer:

B. Platelet