In an ablated animal, myeloid series cells are injected. Which of following is seen after incubation period?
**Core Concept**
In this question, we are testing the understanding of the hematopoietic system, specifically the myeloid lineage. The myeloid series of cells gives rise to red blood cells, platelets, and various types of white blood cells, including granulocytes and monocytes. The question involves the concept of hematopoietic stem cell ablation and reconstitution.
**Why the Correct Answer is Right**
When myeloid series cells are injected into an ablated animal, the host's bone marrow is repopulated by these cells. This leads to the reconstitution of the myeloid lineage, resulting in the production of mature myeloid cells, including granulocytes (such as neutrophils and eosinophils) and monocytes. These cells are essential components of the immune system, playing critical roles in defense against infection and inflammation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the myeloid lineage or hematopoietic stem cell ablation.
**Option B:** This option is incorrect because lymphoid series cells, not myeloid series cells, give rise to lymphocytes (B cells and T cells).
**Option C:** This option is incorrect because endothelial cells are a separate lineage that gives rise to blood vessel lining cells, not myeloid cells.
**Clinical Pearl / High-Yield Fact**
The hematopoietic system's ability to reconstitute itself after ablation is a critical concept in bone marrow transplantation and hematopoietic stem cell therapy.
**Correct Answer: C.** Mature myeloid cells, including granulocytes and monocytes.