What is a respiratory haversack?

What functional advantages a neuron with several have over a neuron with only one dendrite? If you have jock itch do you need to throw away the jock straps you wore before getting it to avoid more infection. And what about underwear...should you throw your Jockey briefs away as well? What muscles run down side of leg? Can I use sauna after 3 days of tooth extraction? How does iron get into red blood cells? How maximum chances of pregnancy increases? Which defence targets specific pathogens? What is the cause and affect of asperger syndrome? What is the Skeletal system of an arthropod called? What causes high ferritin levels? What is the function of muscles? Can deep conditioning help burnt hair? What does it mean when the Dr says your lungs are fluffy? How do you create emotion in your writing? Muscle used to raise you arm to shoulder level? Can a person can lift weight after elbow hairline fracture? Does myxedema or severe hypothyroidism has it onset during infacy? How does someone get out of control of a sociopath? Why do you need to protect your reproductive organs? Could you be pregnant if you didn't get a period at all one month and then the following month you had an abnormally light 3-day period but four negative HPTs?