Вена несе кров.

несе means carries or is carrying.

Its dictionary form is нести = to carry.

In this sentence, несе is:

• 3rd person singular
• present tense
• from the imperfective verb нести

So:

• я несу = I carry
• ти несеш = you carry
• вона несе = she/it carries

Here it matches вена because вена is singular.

Yes, it still means vein here.

It is capitalized simply because it is the first word in the sentence. In the middle of a sentence, it would normally be written вена.

So:

• Вена несе кров.
• Ця вена несе кров.

Both use the noun вена = vein.

Вена is in the nominative case because it is the subject of the sentence, the thing doing the action.

Here:

• вена = the thing that carries
• несе = carries
• кров = blood

So вена is the subject, and subjects are normally in the nominative.

Кров is in the accusative case because it is the direct object of несе.

A learner may expect the word to change, but кров belongs to a noun pattern where the nominative and accusative singular are the same.

So:

• nominative: кров
• accusative: кров

That is why the sentence uses кров with no visible ending change.

Ukrainian normally does not use articles.

So a sentence like Вена несе кров can mean:

• A vein carries blood
• The vein carries blood

The exact meaning depends on context.

English requires articles, but Ukrainian usually does not.

Grammatically, несе is present tense.

But in a sentence like this, it often expresses a general fact, not only something happening at this exact moment.

So Вена несе кров is understood like:

• A vein carries blood
• Veins carry blood in a general biological sense

This is very common in Ukrainian: the present tense can describe general truths.

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

The neutral order here is:

• Вена несе кров.

But other orders are possible for emphasis, for example:

• Кров несе вена.

That would sound marked or contrastive, something like It is blood that the vein carries or The thing carrying the blood is the vein depending on context.

So the original order is the most straightforward and natural for a simple statement.

The verb is singular because вена is singular.

• вена = vein
• несе = carries

If the subject were plural, the verb would also be plural:

• Вени несуть кров. = Veins carry blood.

So:

• singular subject → несе
• plural subject → несуть

Yes, it is understandable and grammatical.

It sounds like a simple textbook-style sentence describing function or anatomy. In real-life explanation, a speaker might also say something slightly fuller, such as:

• Вени несуть кров до серця. = Veins carry blood to the heart.

But Вена несе кров is perfectly fine as a short learning sentence.

The main stresses are:

• вена́
• несе́
• кров

So the sentence is pronounced approximately as:

• ве-НА не-СЕ кров

A useful thing to notice is that the stress in вена is on the last syllable:

• вена́, not ве́на

And in несе the stress is also on the last syllable:

• несе́