Answer:
The correct answer is- Immune system
Explanation:
There are physical, chemical and immunological barriers present in our body which helps us to protect from the foreign antigen. They all assist each other and helps in pathogen removal from our body.
The physical barrier includes skin, gastrointestinal tract, respiratory tract, etc which do not allow the microbe to enter the body. Chemical barriers include tear, saliva, acid in the stomach which kills microbes on the body surface.
Immune cells like macrophages, B cells kills microbes when it gets in the body. Lymphatic system also contain immune cells and helps in microbe removal.
So the immune system is assisted by physical barrier, chemical barrier, and lymphatic system.
Answer:
Yes because if you put salt in water soon after the water will be clear
Answer:
In reality, natural gas power plants will likely operate for at least 50 years, reducing the already minimal construction-cost impacts even further. ... In short, the decade-long economic benefits of replacing coal power with natural gas power will continue in future decades as well.
Explanation:
It develops from an outer fold on the surface of the yolk sac<span>, which lies outside the </span>vitteline envelope<span> and is developed by the </span>follicle cells<span> while the </span>egg<span> is in the </span>ovary<span>.</span>
