Pectinate muscles are parallel ridges in the walls of the atria of the heart. The name is due to their resemblance to the teeth of a comb (pecten). The heart is the organ pumps blood to all parts of the body. It is made up of four chambers, that is, right and left ventricles, left and right atria, and the blood vessels, Pulmonary artery, pulmonary vein, aorta, and venacava. An auricles are pouch like structure that increase the total filling capacity of the atrium and also increase the volume of blood that an atrium is able to contain.
Answer:
molten rock in the earth's crust. 1. The blazing magma was surging by us. 2. With the temprature cool, magma would be hardened into rock.
Answer:
A
Explanation:
definitely A, let me know if you need more explanation
The answer is stratosphere...
Explanation:
The way the Cell cycle works helps us keep us alive as long as usually do. An example is when you bite your cheek, you may kill some cells by it but your alive cells will replace them by creating more. Now without the cell cycle here's what would happen, You bite your cheek and your cells die forever causing your mouth to be dryer, weaker and to lack enzymes ( enzymes help brake down your food and ready it to go threw your digestive system ) So imagine every time you get hurt and your cells just keep dying without being reborn that's like as if everyone stopped creating children eventually the human race would end, If the cell cycle does not do its job eventually you will get weak and die. that's why the Cell Cycle is important to any living things well being especially if its Multicellular.
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