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<u>cardic muscles:</u> are present only in the heart .single cell is not very strong by itself, millions of cardiac muscle cells working together are easily able to pump all of the blood in the body through the heart in less than a minute. Cardiac muscle cells have a branched shape so that each cell is in contact with three of four other cardiac muscle cells.
<u>characteristics of cardic muscles: </u> one nucleus ,striated, involuntary, branched and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and hold the fibers together when the heart contracts.
Mammalia (mammals) have hair or fur and produce milk
<span>continue to divide even when they are tightly packed together.
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Answer:
C
Explanation:
Due to technology being ubiquitous, more and more gadgets that are produced are consuming more and more energy. This means that there is a need for cheap energy. Currently, cheaper sources of energy are non-renewable such as coal and crude oil. These pollute the environment causing climate change.
Answer:
b
Explanation:
because of the law of cause and effect change a small part of a structure change the whole thing