The heart pumps blood throughout the body and the stomach helps us digest the food we eat. How do the muscles help these two organs perform their function? Both the heart and stomach continue to work on their own by contracting and shortening their muscles.
The muscles of the heart and stomach contract and relax when we tell them to do so.
The muscles of the heart and stomach contract and relax without us thinking about them.
When the muscles of the heart and stomach contract, they pull on the bones and make them move.

Where is energy trapped inside the organelle chlorophyll

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules,vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

Number and variety of living organism; includes genetic, species, and ecological types