Артерія несе кров.

Нести is the infinitive, meaning to carry.
Несе is the 3rd-person singular present-tense form, used because артерія is singular.

A few forms of нести:

• я несу́ — I carry / am carrying
• ти несе́ш — you carry / are carrying
• він / вона / воно несе́ — he / she / it carries / is carrying
• ми несемо́
• ви несете́
• вони несу́ть

So Артерія несе кров uses the correct verb form for it carries.

It can mean either, depending on context.

Ukrainian present tense often covers both:

• carries
• is carrying

In this sentence, it is most naturally understood as a general fact, so in English it is usually carries rather than is carrying.

Артерія is in the nominative singular because it is the subject of the sentence.

It answers the question what carries blood?
Answer: артерія.

That is why it stays in its dictionary form here.

Кров is the direct object, so it is in the accusative singular.

The important thing is that for this noun, the accusative looks the same as the nominative:

• nominative: кров
• accusative: кров

So even though English learners may expect a visible ending change, there is no change here.

Yes. Кров is a feminine noun.

Not all feminine nouns end in -а or -я. Some feminine nouns end in a consonant, and кров is one of them.

That is why its forms may look less obvious to an English speaker. For example:

• кров — nominative / accusative
• крові — genitive / dative / locative
• кров’ю — instrumental

Because Ukrainian does not have articles.

So Артерія несе кров can mean different things depending on context, such as:

• An artery carries blood
• The artery carries blood

In a sentence like this, it is usually understood as a general statement.

This is a very good question, because English carry can match more than one Ukrainian verb.

• нести often suggests carrying in a particular direction or along a path
• носити often suggests repeated carrying, carrying around, or in some contexts wearing

With blood moving through an artery, несе is the natural choice here. It fits the idea of blood being carried along through the vessel.

So:

• Артерія несе кров — natural
• Артерія носить кров — not natural here

Yes, Ukrainian word order is more flexible than English word order.

The neutral, basic order here is:

• Артерія несе кров.

That is the best version for a simple textbook sentence.

Other orders are possible, but they change the emphasis:

• Кров несе артерія. — emphasizes blood
• Несе кров артерія. — more marked or stylistic

So for learners, Артерія несе кров is the safest and most neutral order.

Yes, it is grammatical and understandable.

It sounds like a simple educational or textbook sentence. In real life, Ukrainians might also say:

• Артерії несуть кров. — Arteries carry blood
• Артерії несуть кров від серця. — Arteries carry blood away from the heart

So your sentence is fine, but the plural version may sound a little more natural when speaking about arteries in general.

The stress is:

• арте́рія
• несе́
• кров

A rough English-style pronunciation guide is:

• арте́рія ≈ ar-TEH-ri-ya
• несе́ ≈ ne-SEH
• кров ≈ krov

A few pronunciation notes:

• Ukrainian р is usually tapped or rolled.
• я at the end of артерія sounds like ya.
• в in кров is pronounced as v.

Yes, you could, but it would sound a bit different.

• несе = carries
• переносить = transports / carries from one place to another

So:

• Артерія несе кров sounds simple and straightforward.
• Артерія переносить кров sounds a bit more technical or formal.

For a beginner sentence, несе is perfectly good.