Medicul ascultă inima.

Because Romanian usually puts the definite article at the end of the noun instead of using a separate word like English the.

• medic = doctor

• medicul = the doctor

• inimă = heart
• inima = the heart

So the sentence uses two definite nouns: the doctor and the heart.

Inimă is the basic dictionary form, meaning heart.

When you want to say the heart, Romanian adds the definite article to the noun:

• inimă = a heart / heart
• inima = the heart

So inima is not a different word; it is the definite form of inimă.

Ascultă is the 3rd person singular present form of a asculta.

Here it means:

• he/she listens
• he/she is listening

So in this sentence, ascultă agrees with medicul (the doctor), which is singular.

A quick pattern:

• eu ascult = I listen
• tu asculți = you listen
• el/ea ascultă = he/she listens

Because Romanian uses a asculta differently from English.

In English, you usually say listen to something.
In Romanian, a asculta can take a direct object without a preposition:

• ascultă inima = listens to the heart

So Romanian does not need a separate word equivalent to English to here.

It can mean either one, depending on context.

Romanian present tense often covers both:

• simple present: The doctor listens to the heart
• present continuous: The doctor is listening to the heart

If there is no extra context, English can translate it in more than one natural way.

Yes. Medicul is the subject, because it is the one doing the action.

• Medicul = the doctor → the one who listens
• ascultă = listens / is listening
• inima = the heart → the thing being listened to

So the structure is:

Subject + Verb + Object

Yes, it is the direct object, so functionally it is in the accusative.

However, for many Romanian nouns, the accusative form looks the same as the nominative form. So here you do not see a special extra ending caused by the case itself.

What you are mainly seeing in inima is the definite article (the), not a special accusative ending.

Not in normal Romanian.

Romanian usually needs proper noun forms here:

• medicul = the doctor
• un medic = a doctor
• inima = the heart
• o inimă = a heart

So natural versions would be things like:

• Medicul ascultă inima. = The doctor listens to the heart.
• Un medic ascultă o inimă. = A doctor listens to a heart.

Bare forms like medic and inimă without articles are generally not used this way in an ordinary sentence.

Yes, Romanian word order is somewhat flexible, but Medicul ascultă inima is the most neutral and straightforward order.

This is a normal Subject–Verb–Object pattern:

• Medicul → subject
• ascultă → verb
• inima → object

Other orders are possible in Romanian, but they usually change the emphasis or sound more marked.

A simple approximation is:

meh-DEE-kool as-KOOL-tuh EE-nee-ma

More carefully:

• medicul → meh-DEE-kul
• ascultă → as-KOOL-tuh
• inima → EE-nee-ma

A few helpful notes:

• c in medicul sounds like k
• ă in ascultă is a short central vowel, something like a very relaxed uh
• stress is roughly on:
  • meDIcul
  • asCULtă
  • Inima

Because ascultă is the 3rd person singular present form of a asculta.

That form is used for:

• he listens
• she listens
• it listens
• also with nouns like the doctor

So:

• medicul ascultă = the doctor listens

The ending -ă is part of the verb conjugation, not an article.

Yes. Medic is very close to doctor/physician/medic, depending on context.

In many everyday translations, medicul is most naturally rendered as the doctor. But in some contexts, the medic could also be a possible translation.

No. A asculta has a few related uses.

Common meanings include:

• to listen (to)
• to hear out
• sometimes to obey

In this sentence, with inima (the heart), it clearly means something like a doctor listening to the heart, for example during an examination.