Fill in the blanks with the appropriate artery name. then place the sentences in order to trace a drop of blood from the heart to the left thumb. aortaaxillary a. brachial a. brachiocephalic trunkcommon carotid a. firstradial a. secondsubclavian a. thirdulnar a. the blood first leaves the heart through the  it flows into the        , which is found in the medial upper arm. the        out of the three branches of the aorta takes blood to the right arm. blood going to the thumb would travel through the        in the lateral side of the forearm. after blood flows through the        it flows into the      , which is found in front of the scapula.

The blood first leaves the heart through the brachiocephalic trunk common carotid.
Next it flows into the aorta axillary, which is found in the medial upper arm.
The aorta axillary out of the three branches of the aorta takes blood to the right arm.
Blood going to the thumb would travel through the subclavian in the lateral side of the forearm.
After blood flows through the radial it flows into the ulnar, which is found in front of the scapula.

Explanation:

1. Brachiocephalic trunk carries blood from the left ventricle of the heart to branch arteries.

2. Aorta in the human body is the largest artery. It starts from the top of the left ventricle which is called the heart's muscular pumping chamber. The heart, therefore, pumps blood from the left ventricle into the aorta through the aortic valve.

3. Subclavian veins carry blood to the heart and their function is to empty blood from the upper extremities and then carry it back to the heart.

4. Radial bone is one of the two large bones of the forearm. It is located on lateral side of the elbow to the thumb side of the wrist and parallel to the ulna.

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Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.