Came here to get the achievement for answering a question but sorry bud your on your own on this one.
Force and leverage help to explain how the body works. Force helps the body to move in space as it acts against the air around it. Leverage helps the body stay upright.
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Answer:
This usually occurs as a result of fatigue, overuse, or improper use of a muscle.
Strains can happen in any muscle, but they're most common in your lower back, neck, shoulder, and hamstring, which is the muscle behind your thigh.
A muscle strain, or pulled muscle, occurs when your muscle is overstretched or torn.
HIV can be transmitted from one person to another person by contact between infected saliva and an open wound.
Further explanation:
Transmission of HIV:
A person can get HIV by coming into direct contact with certain body fluids from a person who is suffering from the disease.
These body fluids include
- Blood
- Rectal fluid
- Vaginal fluid
- Breast milk
- Saliva
When these fluids having HIV come in contact with the bloodstream of a person who is HIV negative through a mucous membrane ( which is present in the vagina, mouth, rectum, or on the tip of the penis ); open sore or cut, or by direct injection.
Activities by which HIV spread from person to person:
HIV spread by specific activities. In the United States, HIV is commonly spread by following method:
Sex with a person having HIV. Sharing the injection drug equipments for example needles with a person having HIV.
While the less common methods of spread of HIV are
From a mother to a child during birth, pregnancy or breast feeding. The use of HIV medicines has lowered the risk of transmission of HIV from mother to child in the United States.
Answer details
Subject: Health
Level: High school
Keywords
- Transmission of HIV
- Activities by which HIV spread from person to person
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