摘要
用光镜和扫描电镜技术观察了2~10月龄人胎手指端真皮乳头嵴的形成过程。结果证实:3个月龄时真皮表面出现了原始真皮嵴,5个月龄时每条原始真皮嵴开始分化形成两条同源的真皮嵴,6个月龄时每条真皮嵴又开始分化形成许多真皮乳头,并由真皮乳头组成真皮乳头嵴,以后随胎龄的增加真皮乳头嵴逐渐增大。汗腺导管于4月龄时出现于原始真皮嵴间沟内,随着同源真皮嵴和真皮乳头嵴的形成,使汗腺导管位于两条非同源真皮乳头嵴间沟内。每条表皮嵴包被有两条非同源真皮乳头嵴。
he process of finger corium ridge formation was studied in human fetus aged 2 10 months by light and scanning electron microscopy.The results showed that primordial corium ridges were present on the surface of the corium at the 3rd month and each of them devided into two homologous corium ridges from the 5th month.At the 6th month,each of the corium ridges differentiated into many dermal papillae and arranged as dermal papilla ridges and they became larger with development of the fetus.The duct of sweat gland appeared in the grooves between primordial corium ridge from the 4th month onwards and they located in the grooves between dermal papilla ridges those were non homologous with the forming of homologous corium ridges and dermal papilla ridges.Two nonhomologous dermal papilla ridges were wrapped up by each epidermis ridges.
出处
《解剖学报》
CAS
CSCD
北大核心
1997年第4期422-425,I017,共5页
Acta Anatomica Sinica
关键词
真皮嵴
真皮乳头
真皮乳头嵴
光镜
扫描电镜
Corium ridge
Dermal papilla
Dermal papilla ridge
Human fetus△Department of Biology,Hebei Normal University,Shijiazhang 050016,China