Web8 mei 2024 · Epithelization of the medullary cord results in the formation of many lumina. [6] [5] The process of cavitation takes place and results in the creation of a central … Web1. One of the paired mucous membrane-lined air cavities in a bone, specifically the frontal sinuses in the forehead, the maxillary sinuses (antrums) in the cheek bones, the multicelled ethmoidal sinuses on either side of the upper part of the nose and the sphenoidal sinuses in the base of the skull. 2.

Central nervous system embryology Radiology Reference …

Web1. The primitive sex cords and indifferent gonad • Shortly before and during arrival of primordial germ cells, the epithelium of the genital ridge proliferates, and epithelial cells … Web31 jul. 2024 · The umbilical cord inserts into the center of the placental bulk and into the fetus at the umbilicus . Variations in insertion can occur. For example, eccentric insertion, … hse health insurance card

SH Practical - Lymphatic Structure and Organs

Web3 sep. 2014 · Embryonic testis exhibited a thin cortex, whereas embryonic ovary exhibited a thick cortex. Testicular cord formation was found in the medulla of embryonic testes while the lacunae and fat-laden cells were found in the medulla of embryonic ovary during gonadal function. Web被TFH激活的B细胞部分迁移到髓质索 (medullary cord)，5天左右以后扩增形成原发灶 (primary focus)。 这些细胞一般都是具有较高亲和力的IgM分泌原浆细胞 (plasmablast)，它们是病原体感染第一阶段的体液免疫细胞。 通常这些细胞寿命较短，不能形成成熟浆细胞 (plasma cells)。 另外大多数被TFH激活但亲和力不够高的B细胞会进入滤泡，在这里大量 … WebThe development and differentiation of the ovary are determined by the genetic constitution of its XX sex chromosomes and are characterized by the following The primary sex … hse health promotions