1. Spermatogenic epithelium refers to the cell layer that produces sperm in the male reproductive system. It consists of two main cell types: sertoli cells and spermatogenic cells. The main function of sertoli cells is to provide nutrition and support to help spermatogenic cells divide and differentiate. These cells can also secrete a variety of bioactive substances, such as androgen binding protein and insulin-like growth factor.
2. Spermatogenic cells are the main cell types that produce sperm in male reproductive system. They proliferate through mitosis and gradually differentiate into spermatogonia, primary spermatocytes, secondary spermatocytes and sperm cells. In the process of spermatocyte division, chromosomes replicate and recombine, and finally form sperm with specific morphology and function.
3. During the development of spermatogenic epithelium, sertoli cells and spermatogenic cells interact and influence each other. Supporting cells provide nutrition and support to help spermatogenic cells divide and differentiate; Spermatocytes regulate the physiological activities of sertoli cells by secreting a variety of bioactive substances, such as androgen binding protein and insulin-like growth factor.
Related knowledge of cells
1. Cell membrane is the external structure of cells, which is mainly composed of protein and lipids. It can control substances in and out of cells, and it can also transmit signals and information. The function of cell membrane is to protect cells from the external environment and maintain the stability of the internal environment.
2. Cytoplasm is a liquid substance inside cells, which is mainly composed of water, organic compounds and ions. Cytoplasm contains various organelles, such as mitochondria, chloroplasts, endoplasmic reticulum and Golgi apparatus. , each with a specific structure and function. Mitochondria are "energy factories" of cells, which can synthesize ATP (energy currency) and provide energy for various activities of cells.
3. The nucleus is the control center of the cell and contains DNA molecules, which is the genetic material of the cell. The main function of nucleus is to store and express genetic information and control the growth and division of cells. In the nucleus, protein is synthesized by DNA through transcription and translation, and these protein are necessary for various cell activities.