Internal insemination is characteristic of land animals, in which the external genitalia develop. With their help, the seminal fluid is transferred to the female genital tract, where fertilization occurs. External insemination is characteristic of aquatic animals in which seminal fluid (sperm) and eggs (eggs) are thrown into the water.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.