Answer:
While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. Striated muscle contracts and relaxes in short, intense bursts, whereas smooth muscle sustains longer or even near-permanent contractions.
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Answer:
the bones that are inside your body
Ecology is environmental science.
<span>Ecology- the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Hope this helps!</span>
Mercury, due to it's low gravity it would not be able to hold a very strong atmosphere.
