Biology Human Health & Diseases part 12 (Immunity, innate immunity) class 12 XII

TL;DR

Immunity is the body's ability to fight disease-causing organisms, with two types - innate and acquired.

Transcript

hello friends this video on human health and diseases part 12 is brought to you by exam for calm no more fear from exam we will talk about immunity so let us see what does immunity now immunity is the ability of an organism to fight the disease-causing organisms so by now we saw that there are a set of organisms which are capable of causing disease... Read More

Key Insights

• ❓ Immunity is the body's defense mechanism against disease-causing organisms.
• 🅰️ There are two types of immunity: innate and acquired.
• 🪚 Innate immunity includes physical, physiological, cellular, and cytokine barriers to prevent the entry of foreign substances.
• 🛟 Acquired immunity is acquired later in life through substances that provide specific defense against certain pathogens.
• 📶 The strength of the immune system determines an individual's susceptibility to infections.
• ❓ Innate immunity provides general protection against common infections, while acquired immunity is pathogen-specific.
• 🚜 Physical barriers like the skin and lining of respiratory and gastrointestinal tracts act as the first line of defense.

Questions & Answers

Q: What is immunity?

Immunity is the body's ability to fight disease-causing organisms and protect against infections.

Q: What are the two types of immunity?

The two types of immunity are innate immunity, which is present by birth and nonspecific, and acquired immunity, which is acquired later in life and specific to certain pathogens.

Q: How does innate immunity protect the body?

Innate immunity includes physical barriers like the skin, physiological barriers like stomach acid and saliva, cellular barriers like monocytes and macrophages, and cytokine barriers that prevent the growth of microorganisms.

Q: What is the difference between innate immunity and acquired immunity?

Innate immunity is present from birth and provides nonspecific defense, while acquired immunity is acquired later in life and is specific to certain pathogens.

Summary & Key Takeaways

• Immunity is the body's defense mechanism against disease-causing organisms.

• There are two types of immunity: innate immunity, which is inborn and nonspecific, and acquired immunity, which is acquired later in life and pathogen-specific.

• Innate immunity includes physical, physiological, cellular, and cytokine barriers that prevent the entry of foreign substances into the body.