Answer:
1. Electrical impulses in the heart cause the muscle to contract.
2. To keep the blood flowing in only one direction
Explanation:
In the first question, the correct answer is ''Electrical impulses in the heart cause the muscle to contract''. Every muscle in our body contracts because of electrical impulses and this is also true for our hearts. Or any hearts in nature that we know of.
In the second question, the answer is ''To keep the blood flowing in only one direction''. We have those valves and without them, we wouldn't be able to function as we do.
1 the process of segregating, elaborating, and releasing some material either functionally specialized (such as saliva) or isolated for excretion (such as urine)
: a product of secretion formed by an animal or plant
especially : one performing a specific useful function in the organism
2 [ 2secrete ] : the act of hiding something
I believe the answer you are looking for is "case study"
A case study is a publication of an experience conducted over an amount of time. It could be based on behavior for each or a group.
Answer:
superficial
Explanation:
Skin is the outermost layer of the body. It's the closest to the surface. Therefore it is supercial to the stomach, which is more "deep" inside the body.
Ex) The skin is superficial to the muscles
