ACROSS
4. The system helps us get
oxygen from the air into our blood.
5. the central part of the circulatory system
that pumps blood through blood vessels
to the body
7. He wrote books and illustrated body
systems.
-people lead inactive lives
and seldom exercise,
I DOWN
1. The
system is the body's
control center and includes the brain and
spinal cord.
2. covers the ends of some bones to absorb
the energy from hard bumps
3. the central part of the nervous system
C
6_ is important in making
healthy muscles and keeping your brain
younger.
PLEASE can you help me, please

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.