Marks your distance in order to track calories lost
Smell: to use your nose to sense objects or gas using the energy that is released into the atmosphere. Sometimes something smells familiar, so you perceive what it is.
Sentence: Once I walked in my house, the only thing I could smell was pizza.
The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils. Hope this helps.
I would have to guess TRUE because cardiac means heart.
