<span>The common cold, the flu, food poisoning, and toothaches all stem from pathogens. Pathogens are infectious agent that causes disease or illness to its host. The term is often used for agents that disrupt the normal physiology of a multicellular plant or animal, like the human.</span>
Answer:
he main difference between epithelial tissue and connective tissue is their function and the cells they are comprised of. Epithelial tissue consists of three cell types; squamous, cuboidal and columnar. The tissue is one (simple) or more (stratified) cells thick. Skin is made of epithelial tissue.
Answer:
The question is incomplete, the missing part says: and suggests that maybe it is caused by stress. Hadad worries that there is something physically wrong, and he doesn't feel these symptoms are stress-related. What can he do?
He should visit another doctor or be persistent with his doctor.
Explanation:
Haddad should visit another doctor that may have a different point of view or run different tests on him. Another possibility is to keep visiting his doctor and claiming that he is not feeling well until the doctor finds out what is the problem with more tests or a deeper examination.
