Human fetuses have an immune system that acts differently from the adult version. By 13 weeks of gestation, human fetuses have developed a much more unusual immune system than previously thought. Credit: Dopamine/SPL A human fetus in its second trimester is extraordinarily busy. It is developing...
There are increasing data supporting the existence of a cell hierarchy within the mammary gland. At the top or this hierarchy a small population of cells with self-renewal properties maintains the tissue architecture and remodeling, and they are known as stem cells. Also, recent evidences indicate...
César Cobaleda C, Cruz JJ, González-Sarmiento R et al (2008) The emerging picture of human breast cancer: as a stem cell-based disease. Stem Cell Rev 4:67–79César, CobaledaJuan Jesús, CruzRogelio, González-SarmientoIsidro, Sánchez-GarcíaJesús, Pérez-Losada. (2008) The Emerging ...
The hymen is a thin membrane of tissue that surrounds and narrows the vaginal opening. It may be torn or ruptured by sexual activity or by exercise. Vagina Conditions Vaginitis: Inflammation of the vagina, commonly from a yeast infection or bacterial overgrowth. Itching, discharge, and change of...
The vagina receives the penis during sexual intercourse and also serves as a conduit for menstrual flow from the uterus. During childbirth, the baby passes through the vagina (birth canal). The hymen is a thin membrane of tissue that surrounds and narrows the vaginal opening. It may be torn...
Picture of a human melanoma cell line growing in tissue culture,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行
The middle layer of the skin. Made up of elastin/collagen (a type of connective tissue); this gives the skin its flexibility and strength. Houses the sweat glands, oil glands (sebaceous glands), hair follicles, muscles, nerve endings, blood vessels, and dendritic cells. ...
Steaming, Fettig approaches a linebacker type at one end of the human chain. “Look here, I’m headed to the Cross County highway on important business. I need to get through here right now!” The kid assumes a wide stance, hands on hips. “No one comes or goes. Not over our dead...
It is this tissue, and not blood, that serves as food for the chiggers. Chiggers have delicate mouth parts that typically can enter human skin only at areas where the skin has folds or wrinkles. Most chigger bites occur around the ankles, the back of the knees, the crotch, under the ...
a.The mental process is mainly used in organizational changes in the reform of human psychology, psychological basis for different psychological state to the organizer or management.The psychological process plays an important role in the research and development of human tissue. . 精神过程主要用于在...