This is the 7312th most frequent Japanese word.
乳腺
Mammary gland.
In this sentence, "乳腺" (mammary gland) is being used in a biological and anatomical context to describe its function.
乳腺は乳汁を生成する組織です。
The mammary gland is the tissue that produces milk.
Here, "乳腺" is referred to in the medical context, highlighting health and diagnostics.
彼女は乳腺の健康検診を受けました。
She underwent a health examination for her mammary glands.
In this example, "乳腺" concerns medical assessment and observation of the glands as part of health monitoring.