yes
It would be their immune system.
The specific defense system is also known as the acquired immune system.
The body is made up of a specific defense system and nonspecific defense system. The nonspecific defense system is made up of inflammation, fevers, etc. The immune system is part of the specific defense system. This is because the lysosomes in this system bind to specific antigens and have a certain role to carry out. Therefore, there aren't nonspecific defenses in the immune system.
yes
The immune system
The body's defense system is the immune system.
The second level of defense typically refers to the body's immune response, specifically the innate immune system, which acts after the first line of defense (physical barriers like skin and mucous membranes) is breached. This level includes various immune cells, such as phagocytes and natural killer cells, that respond quickly to pathogens. It also involves inflammatory responses and the release of antimicrobial substances to help control infections. Overall, the second level of defense plays a crucial role in providing a rapid and non-specific response to invading microorganisms.
the immune system
Because the body does what it wants
An immune response is part of the body's defense against pathogens in which cells of the immune system react to each kind of pathogen with a defense targeted specifically toward that pathogen.
The innate immune system is the branch of the immune system that responds immediately to pathogens. It provides rapid but non-specific defense mechanisms, such as physical barriers and inflammatory responses, against a wide range of invaders.
No, the circulatory system is not the last line of defense against infection. The immune system plays the primary role in defending the body against infections. The circulatory system helps in distributing immune cells and antibodies throughout the body to fight off infections, but it is not the final line of defense.