猪翻乳头的解剖组织学特征的研究与探讨

STUDY ON HISTOLOGICAL ANATOMY OF INVERTED NIPPLE IN PIGS

通过对正常乳头、翻乳头、副乳头及其乳房的组织样本进行解剖学观察、对照，发现正常乳头由乳基、乳头体组成；翻乳头由乳基、不明显的乳头体（ 或无乳头体） 组成；副乳头只有小突起。对各类乳腺做成切片观察、对照，发现正常乳头和翻乳头均有完整的乳腺、乳管，副乳头的乳腺、乳管不发达，且很稀少。

When the normal teat,inverted teat and supernumerary teat were observed and compared with each others,it was revealed that normal teat was composed of teat base and nipple,invered teat was composed of teat base and undistinguished nipple(or without nipple)and supernumerary teat only had small tubercle. Inverted teat was classified incompletely inverted teat and blind teat.Blind teat had no nipple and can not give milk.Incompletely inverted teat had nilpple which inverted at the special stage.Giving milk was not defined. Observing and contrasting histological section of different mammary gland,it was discovered that both normal teat and inverted teat had intact mammarmy gland and milk duck,but supernumerary teat had agenesic mammary gland with a few milk duck.