You need to write a letter a family member explaining what the 11 body systems are,
and their functions. You then need to
explain in detail which system you believe is
the most important and why. Finally,
explain which system you feel is the least
important and why.

Muscular, skeletal, digestive, excretory, nervous, reproductive, respiratory, endocrine, integumentary, urinary, circulatory

Explanation:

The most important body system is the circulatory system. I think this because without it, your body won't get the oxygen it needs to certain organs like your brain and your other internal organs, and then you'll die. And, your body will have a bunch of waste built up because your body's circulatory system takes any waste and carries it to the kidneys, then there it gets filtered.

The system that is the least important is probably the excretory, because you don't need to sweat to cool your body down. You can just stop what you're doing and just wait until your body cools down. But part of me wants to say that this body system is very important, because since the excretory system includes sweating, and sweat is very important because it keeps your body in a state of equilibrium.

the peripheral nervous system or pns contains the nerves, which leave the brain and the spinal cord and travel to certain areas of the body. the peripheral nervous system's main job is to send information gathered by the body's sensory receptors to the cns as quickly as possible.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.