Ans.
Different barriers present in the body prevent entry of disease causing agents or pathogens from entering into body and provide protection against them. These barriers include various physical, chemical, and biological barriers.
Physical barrier include skin and coughing and sneezing. Skin provides first line of defense by preventing entry of pathogens, and coughing and sneezing that expels harmful agents out of the body.
Chemical barriers include lysozyme, acids, and oil secretion. Lysozyme is an enzyme that kills bacteria by targeting their cell wall, while oil and acid prevent microbial growth by providing non-favorable environment for them.
Biological barriers include phagocytes and Langerhans cells. Phagocytes are immune cells that engulf and destroy pathogens and Langerhans cells are antigen-presenting cells that help in elimination of pathogens.
Answer: Option 1, 2,3, 4, 5 are all correct.
Explanation:
The spleen is an organ that is located in the left quadrants of the abdomen and it's extend from the 9th to the 11th ribs. It is like the clenched of a fist in shape and it is found between the fundus of the stomach and diaphragm, found underneath the diaphragm. It is a soft mass of lymphatic tissue which is part of the lymphatic system.
Spleen help to filter and remove old blood cells. It function in cell mediated and humoral immune responses.
Answer:
yes due to any kind of sexual activity, if the person has a sexual disease it can be transferred to a male via orally or vaginally
Answer:
Which is an example of how the atmosphere interacts with the hydrosphere?
For example, rain (hydrosphere) falls from clouds in the atmosphere to the lithosphere and forms streams and rivers that provide drinking water for wildlife and humans as well as water for plant growth. water evaporates from the ocean into atmosphere.
Explanation:
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<u>Mutualism</u>. Both species directly benefit from one another.
