★ Disease and Immunity Quiz
The human body has a number of barriers to prevent infection by pathogens some of which are listed below.
1. Skin
2. Mucus
3. Antibodies
4. Stomach acid
5. Hair in the nose
Which are these are examples of mechanical barrier?
A. 1 and 4
B. 2 and 3
C. 3 and 5
D. 5 and 1
Select your answer:
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Histology HS › ViewThe red pulp of the spleen is formed by:
A. Lymphatic follicles
B. Medullary cords and sinuses
C. Paracortical zone
D. Capsule and trabeculae
E. Reticular tissue with erythrocytes and other blood cells
Cardiovascular System › View
Double membrane sac that covers the outside of the heart
A. Pericardium
B. Myocardium
C. Endocardium
D. All of the above