Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


Get rid of negative lifestyle such as smoking ,drinking alcoholic beverages and etc.
0 0 0
Respiratory System: avoid smoking, maintain dust-free surroundings
Circulatory System: take enough rest, exercise regularly, eat balanced diet
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts