Question

Study the following diagram carefully and then answer the questions that follow:

1. Name the cell labelled 1.
2. Identify the phenomenon occurring in A.
3. Mention two structural differences between 1 and 2.
4. Name the process occurring in B and C and state the importance of this process in the human body.

Answer 1

1. Red blood cells
2. WBC squeezing through the wall of the capillary in the tissue. (Diapedesis).
3. White blood cells, also known as leukocytes, have a nucleus but lack haemoglobin.
4. The process that occurs in B and C is phagocytosis. In this process, the WBCs engulf and destroy the foreign particles, thus preventing disease occurrence.