Answer:
There are 2 Valve Systems
Explanation:
The mitral valve and tricuspid valve are located between the atria (upper heart chambers) and the ventricles (lower heart chambers).
It is (B) it is strange but it does weaken the immune system
Answer:
false
Explanation:
the only sure way of protecting yourself from any sexual contracted disease is to remain abstinent. however, if you decide to not choose to be abstinent the second best method to avoid anything would be the act of using condoms which even though is not 100 percent effective it is still more effective than any other option. a shower is absolutely in no way going to protect you from obtaining any std after intercourse.
Answer:
The correct answer is option D
d) Children have an immature immune response.
Explanation:
It is true that Children have an immature immune response which develops throughout life on continuous exposure to germs and diseases.