Question

Given is a diagram of a human blood smear. Study the diagram and answer the question that follows.
Components numbered 1 do not have certain organelles but are very efficient in their function. Explain.

Answer 1

Hint: There are four components of blood smear that are numbered 1 to 4 in this diagram of human blood smear. 1) Red blood corpuscles, 2) Neutrophil, 3) Blood platelets, 4) Blood plasma. These are the components of the blood smear performing specific functions in the blood and helps in transport of food and gases to every part of the body.

Complete answer:
The component number 1 is Red blood corpuscles (RBCs) do not have nucleus and ribosomes or mitochondria and are called denucleated. The major function of the RBC is to transport oxygen from our lungs to the cells of the body and in return bring back carbon dioxide back to our lungs which is exhaled out of the body. Thus, RBCs are very efficient in their function and help in diffusion of oxygen and carbon dioxide across the RBC’s plasma membrane.
Neutrophils are polymorphonuclear and phagocytic leukocytes that comprise the first line of host immune response against invading pathogens. They also provide immunity during tissue injury and attack by any microbe.
Blood platelets help in coagulation of the blood. It reacts to the injury by clumping thereby initiating a blood clot while bleeding.
Blood plasma is a yellow liquid fluid that holds the blood cells of whole blood in a suspension. It is a liquid part of blood that carries cells and proteins throughout the body.

Note: Red Blood Corpuscles contain hemoglobin molecules, which is an iron-containing molecule that can bind oxygen and is responsible for red color of the blood.