question #1 Sahih Muslim 334b, Book 3, Hadith 78 : What is the significance of distinguishing between menstruation and other types of bleeding in Islamic jurisprudence?

Umm Habiba b. Jahsh who was the sister-in-law of the Messenger of Allah (ﷺ) and the wife of ‘Abd al-Rahman b. Auf, remained mustahada for seven years, and she, therefore, asked for the verdict of Shari’ah from the Messenger of Allah (ﷺ) about it The Messenger of Allah (ﷺ) said: This is not menstruation, but (blood from) a vein: so bathe yourself and offer prayer. ‘A’isha said: She took a bath in the wash-tub placed in the apartment of her sister Zainab b. Jahsh, till the redness of the blood came over the water. Ibn Shihab said: I narrated it to Abu Bakr b. ‘Abd al-Rahman b. al-Harith b. Hisham about it who observed: May Allah have mercy on Hinda! would that she listened to this verdict. By Lord, she wept for not offering prayer.