Read the paragraph below from the Introduction [paragraphs 1-3]. The human digestive system is like a long tube of organs. These body parts include your mouth, throat, stomach and intestines. They break the food into pieces. Your body uses these pieces for energy. Special proteins help break down the food even more. The proteins are called enzymes. They are found in your spit and stomach. Enzymes help turn food into nutrients. Your body soaks up these nutrients. Then it gets rid of what it cannot break apart. That waste is your poop. Which question is answered in this paragraph? (A) Why is it so hard for the body to digest corn?

(B) Which foods are difficult for the body to break apart?

(C) How many types of special proteins are in the body?

(D) What role do enzymes have in the digestive process?

The answer is D , it’s most relevant

Muscles in the body us with a lot of things for example, if i wanted to lift a heavy box and had no muscle i would just collapse where i was because of the fact muscles hold us together. overall they are 650 muscle in the human body, all of them have different purposes and ways to keep us together. there are three types of muscle in the body skeletal, smooth, and cardiac muscle. skeletal muscle are attached to the bone and with movement. smooth muscle, this is found in the wall of our organs, such as our stomach, this muscle with movement   as well, without this muscle, we would only be allowed to eat small amounts. the cardiac muscle is the heart muscle and probably the most important one. these are only found in the walls of the heart and the heart pump blood to the other parts of your body. we have two different types of muscle fibers, slow twitch and fast twitch. slow twitch muscles enable long-endurance feats such as distance running. fast twitch fatigue faster but are used in powerful bursts of movements like sprinting. there are three different types of muscle contractions concentric, eccentric, isometric. concentric contraction causes muscles to shorten, thereby generating force.   eccentric contractions cause muscles to elongate in response to a greater opposing force. isometric contractions generate force without changing the length of the muscle.: //athleticquickness.com/muscle-contraction-types-part-1/

1.controls blood flow2.controls oxygen flow3.carries oxygen rich blood to veins