Answer:
1 = veins
2 = cardiovascular system
3 = fibrin
4 = target heart rate
5 = maximal heart rate
c.tissue - the epithelium is a kind of tissue that makes up several organs in the body.
Answer:
antibodies
Explanation:
The third line of defense is specific resistance. This system relies on antigens, which are specific substances found in foreign microbes. Most antigens are proteins that serve as the stimulus to produce an immune response. The term "antigen" comes from ANTI-body GENerating substances.
In the last 20 years,developmental science has completely overturned that picture.So in some ways,we think that this baby's thinking is like the thinking of the most brilliant scientists
The answer should be the "small intestine." 90% of digestion takes place in the small intestine and that's because that's during the process of digestion the small intestine sucks all of the nutrients out of the food then passes off the waste. Digestion starts as soon as you put food in your mouth because your saliva contains chemicals that breaks the food down.
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