Lava is above Earth's surface, magma is below.
Answer:
The semilunar valves prevent backflow of blood into the ventricles.
Explanation:
The semilunar valves are valves found at the junction between the left ventricle and the aorta and also between the right ventricle and the pulmonary artery. They are cup-like in shape and prevent blood from flowing back into the ventricles which are the pumping chambers.
There are two types of semilunar valves. The aortic semilunar valves and the pulmonary semilunar valves. They are made up of the endocardial and connective tissue.
The closure of the semilunar valves causes the second heart sound detected on the stethoscope.
Diseases that arise from the semilunar valves are caused by its stenosis which is the narrowing of the valves and regurgitation where the heart valves can no longer hold firm enough to prevent the backflow of blood.
If you don't ingest enough amino acids you would have difficulties
synthesizing protein. Basically, there are 20 of them in the genetic
code and they build into everything because they are combined into
proteins. They are the second most found molecule in our body after
water, and you need a lot of them. If you don't get them your body won't
have enough protein and you can die if it becomes too extreme.
Answer:
because if not metal than other things like glass wood or fabric would break or not be suitable for the key hole.
Explanation:
flip flops are made of plastic.
<em>The traits of multicellular organisms are A. Can reproduce a whole colony in a matter of hours. and D. Divide in two to produce.</em>
