The B cells are not considered as first line defense structures of the immune’s system
Answer: Option C
<u>Explanation:</u>
Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.
The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.
Auscultation is a check-up administered in your abdomen by using a stethoscope to listen to bowel sounds. When you hear bowel sounds, then your systems are perfectly normal. When there are areas that do not produce any grumbling noises, then there must be blockage in that area.
Let's examine the area for auscultation. The diagram is shown in the picture. The abdomen is divided into four quadrants. The upper boundary is the latissimus dorsi which is the group of muscles behind the arm and stretches to the side.
Answer: If new species, studies come to the table and the classification is not compatible with them
Explanation: Like a new animal was discovered but even using the eight levels of classification scientists couldn't figure what the animal was
2 main cell types: eukaryotic & prokaryotes