Question

signs of infection.

1. _______________ are the moist linings of body cavities like the mouth, nose,

and respiratory tract.

1. the _______________ protects the body from foreign invaders and

disease - causing organisms.

Explanation:

For question 10, the moist linings of body cavities like mouth, nose, respiratory tract are mucous membranes (mucosae). For question 11, the immune system (or integumentary system, but immune system is more about defense against invaders) protects the body from foreign invaders and pathogens. But likely "immune system" or "integumentary system" (skin is part, but also mucous membranes etc. The first line of defense includes skin and mucous membranes, but the immune system is the broader defense. However, for the blank, common answer for 11 is "immune system" or "integumentary system" or "lymphatic system" but most likely "immune system" or "skin" (but skin is part of integumentary). Wait, the first line of defense: skin and mucous membranes. But question 11: "protects the body from foreign invaders and disease - causing organisms" – the immune system is the system that does this. But also, the integumentary system (skin, hair, nails, mucous membranes) is the first line. But let's check the context. Question 10 is about mucous membranes, so question 11: the immune system or the integumentary system. But more likely, for question 10: Mucous membranes (Mucosa) are the moist linings. For question 11: The immune system (or "integumentary system" but immune system is more about defense mechanisms). Alternatively, "skin" but skin is dry, mucous membranes are moist. Wait, no: the integumentary system includes skin and mucous membranes. But the immune system is the body's defense system. So for question 11, the answer is likely "immune system" or "integumentary system". But let's go with the standard:

Question 10: Mucous membranes (Mucosa) are the moist linings of body cavities like mouth, nose, respiratory tract.

Question 11: The immune system protects the body from foreign invaders and disease - causing organisms. (Alternatively, "integumentary system" but immune system is more specific for defense against pathogens.)

Answer:

1. Mucous membranes (or Mucosae)
2. Immune system (or Integumentary system, depending on context; Immune system is more common for defense against invaders)