The similarity of humans with animals lies in a single structure scheme. Human and animal organs are characterized by the same organs and organ systems (circulatory, respiratory, excretory, digestive, nervous, genital, etc.). In addition, the similarity of humans with animals is confirmed by the presence of rudiments and atavisms. A person has more than 90 vestigial organs: tailbone, appendix, wisdom teeth, third eyelid, etc.
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.