The primary function of major organs shown in the figure include; 1. Sporangia; its functions is to produce spore structures which are aggregated to bigger structures. 2. Rhizoids; are structures which are being projected from prothallium and its function is anchoring structures. 3. Prothallus; is the gametophyte and its functions are the carrier of both female and male sex organs. 4. Antheridium; it is the female sex organ and its functions are to produce eggs.