Answer:
The “lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
Answer:
The immune system recognizes damaged cells, irritants, and pathogens, and it begins the healing process. When something harmful or irritating affects a part of our body, there is a biological response to try to remove it.
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These can include:
fatigue.
mouth sores.
chest pain.
abdominal pain.
fever.
rash.
joint pain.
Answer:
Anthropology is the study of what makes people human. Completing a degree in anthropology will allow you to investigate the complexities of human beings. Anthropologists look into different people's lifestyles, how the human species has evolved and how humanity's past has impacted on the present
Explanation:
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