How would a problem with your lungs affect your heart?

If you have a lung problem you may not be processing oxygen as well as you could and it could cause your blood to not oxygenate as well. This would cause you're heart to have to work harder to push enough oxygen through out your body.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.

trachea, alveoli, lung capillaries, arteries