結締組織具有很強的再生能力，創傷的愈合多通過它的增生而完成。結締組織又分為疏松結締組織（如皮下組織）、致密結締組織（如腱）、脂肪組織等。它們都起源于胚胎性結締組織——間充質。在它們的組成成分中除細胞外，還有大量非細胞物質（無定形基質和纖維）。結締組織均起源于胚胎時期的間充質（mesenc細菌yme）。間充質由間充質細胞和大量稀薄的無定形基質構成。間充質細胞呈星狀，細胞間以突起相互連接成網，核大，核仁明顯，胞質弱嗜堿性（圖3－1）。間充質細胞分化程度低，在胚胎時期能分化成各種結締細胞、內皮細胞、平滑肌細胞等。成體結締組織內仍保留少量未分化的間質細胞。疏松結締組織（loose connective tissue）又稱蜂致密結締組織（ dense connective tissue）的組成與疏松結締組織脂肪組織（adipose tissue）主要是由大量脂肪細胞集聚而成。疏松結締組織將成群的脂肪細胞分隔成許多脂肪小葉。根據脂肪細胞的結構和功能不同，可分為兩種脂肪組織：1．白色（黃色）脂肪組織（w細菌ite，yellow adipose tissue）白色脂肪組織中脂肪細胞的結構特點是：①胞質內含有一個大的脂肪滴（Fat droplet），位于細胞的中央，在細菌E染色標本上細菌脂肪滴被溶解而成大空泡狀；②很少的胞質及扁橢圓形的胞核被擠在周邊，此種細胞稱為單泡脂肪細胞。成人大多數的脂肪細胞均屬此類，如皮下組織、系膜、網膜和黃骨髓等。脂肪組織除具有支持、緩沖保護和維持體溫的功能外，還是機體貯存脂肪的“脂庫”。2．棕色脂肪組織（brown adipose tissue）棕色脂肪組織中含有豐富的血管和神經。棕色脂肪細胞的特點是：①細胞呈多邊形，胞質內有許多較小的脂滴和大而密集的線粒體，線粒體與脂滴緊密相貼；② 核圓位于細胞中央，稱此種細胞為多泡脂肪細胞。棕色脂肪在新生兒含量較多，成人含量很少。
Connective tissue has a strong regenerative capacity, wound healing and more through its proliferation and complete. Connective tissue is divided into loose connective tissue (such as subcutaneous tissue), dense connective tissue (such as tendon), adipose tissue and so on. They all originate from embryonic connective tissue-mesenchyme. In addition to the cells in their composition, there are a large number of non-cellular material (amorphous matrix and fibers). The connective tissue all originated from the embryonic mesenchymal (mesenc bacteria yme). Mesenchyme consists of mesenchymal cells and a large number of thin amorphous matrix. Mesenchymal cells were star-shaped cells connected to each other by a network into the nucleus, large nucleoli, obvious nucleoli, weak basophilic cytoplasm (Figure 3-1). Mesenchymal differentiation is low in the embryonic period can differentiate into a variety of connective cells, endothelial cells, smooth muscle cells. Small amounts of undifferentiated mesenchymal cells remain in adult connective tissue. Loose connective tissue (loose connective tissue) also known as dense connective tissue (dense connective tissue) composition and loose connective tissue adipose tissue (adipose tissue) is mainly composed of a large number of fat cells formed. Loose connective tissue separates groups of fat cells into many fat lobules. According to the structure and function of different fat cells, can be divided into two kinds of adipose tissue: 1. The structural characteristics of adipocytes in white adipose tissue are as follows: ① The cytoplasm contains a large fat droplet located in the center of the cell and stained with bacterial E stain Bacterial fat droplets on the specimen are dissolved into large vacuoles; ② very few cytoplasm and flat oval nuclei are squeezed in the periphery, this kind of cells called single fat cells. Most adult fat cells belong to this category, such as subcutaneous tissue, mesangial, omental and yellow bone marrow. Adipose tissue in addition to support, buffer protection and maintain body temperature function, or body fat storage "fat bank." 2. Brown adipose tissue Brown adipose tissue is rich in blood vessels and nerves. The characteristics of brown fat cells are: ① cells were polygons, there are many smaller lipid droplets in the cytoplasm and large and dense mitochondria, mitochondria and lipid droplets in close contact with each other; ② nuclear round in the center of the cell, said such cells are more Soap fat cells. Brown fat in more newborns, adult content is very small.

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