The plural form of the noun heart is hearts.
The plural possessive is hearts'.
Example sentence: The hearts' donors all died in the air accident.
I think that this is a grammar question. Let me give 2 examples.
For example, Jane says to Jenny," Your heart seems healthy."
In this case, the word "heart" is singular because it is only directed at 1 person.
Another example, Jane says to her students," Your hearts are red in colour."
In this case, the word "hearts" is plural because it is directed to more than 1 person, which is plural as well.
Hope this helps!
The plural of heart is hearts.
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural of rose is roses. The plural possessive is roses'.
The plural form is homes; the plural possessive is homes'.
The plural possessive is regions'.
The plural possessive is governesses'.
The singular possessive form is heart's; the plural possessive form is hearts'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The correct form is "its" for the possessive form in the plural. "Its" is used for both the singular and plural possessive forms, without an apostrophe.
The plural is briefs. The plural possessive is briefs'.
The plural is lads. The plural possessive is lads'.
The plural is trollies. The plural possessive is trollies'.
The plural is relatives. The plural possessive is relatives'.
The plural is stations. The plural possessive is stations'.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The plural of rose is roses. The plural possessive is roses'.
The plural form is homes; the plural possessive is homes'.
The singular possessive is biker's; the plural possessive is bikers'.