(a) Draw a diagrammatic sectional view of a seminiferous tubule (enlarged) of human male and label (i) Spermatogenium, (ii) Sertoli cell, (iii) Primary spermatocyte. Write the function of each labelled part.
(b) Differentiate between spermatogenesis and spermiogenesis.

Explanation

### Step-by-Step Solution

#### (a) Diagrammatic Sectional View of a Seminiferous Tubule

1. **Draw the Outer Layer**: Start by drawing the outermost layer of the seminiferous tubule, which is known as the **germinal epithelium**. This layer forms the lining of the seminiferous tubule.

2. **Add Spermatogonia**: Inside the germinal epithelium, draw several small cells to represent **spermatogonia**. These cells are located just beneath the germinal epithelium and are responsible for multiplication through mitosis.

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