Local Defense System

Q. Fill in the blanks by selecting suitable words from the list given below Thin - walled, collenchyma, vascular , tissues, conducting
(i) A group of different
working together to perform a specific function is called an organ

Q.

Which of the following forms the first line of defence of the body against pathogens?

1. Skin

2. Tears

3. Mucus

4. All of these

Q. Among the following which are the features of local defence systems?

1. Local defence systems start working instantaneously.
2. They are are not dependent on previous exposure to infections.
3. They are effective against a wide range of potentially infectious agents.
4. Allof the above

Q.

Which of the following forms the first line of defence of the body against pathogens?

1. Skin

2. Tears

3. Mucus

4. All of these

Q.

Which of the following tissue forms the inner lining of blood vessels?

1. Nervous tissue

2. Connective tissue

3. Muscular tissue

4. Epithelial tissue