The cells in the heart need a constant supply of nutrients / oxygen and to get rid of their waste products ans that why it needs its own special circulatory system.
Answer:Here
Explanation: Circuit training is a high volume but low resistance weight workout with 2-3 minute rest intervals involving cardio, and is focused on improving muscle tone and definition while also improving cardiovascular fitness. It is a popular way of working out, especially if you are looking for variety in your workouts.
Answer:
Asymptomatic HIV infection is the second stage of HIV/AIDS. During this stage, there are no symptoms of HIV infection. This stage is also called chronic HIV infection or clinical latency. During this stage, the virus keeps multiplying in the body and the immune system slowly weakens, but the person has no symptoms.
Explanation:
Stages of HIV Infection
Stages of Infection – (assuming no treatment) ...
Stage 1: Infection. ...
Stage 2: Asymptomatic. ...
Stage 3: Symptomatic. ...
Stage 4: AIDS/Progression of HIV to AIDS.
