Antigens are proteins that are found on the surface of the pathogen and are viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles. Antigens are usually carried by proteins and polysaccharides, and less frequently, lipids but it also needs to be attached to a large carrier molecule which is usually a protein. When an antigen enters the body, the immune system produces antibodies against it. The Antigen stimulates the immune system to produce antibodies. YOUR WELCOME ;)
Answer:
Circulatory system, respiratory system, digestive system, excretory system, immune system…so many systems are there and you may be wondering how they work together. Well, how the digestive, respiratory, and circulatory work together will be mainly discussed here to help understand your body better.
I hope it helps you
Weather, climate, terrain, and the effects of climate change