Fossil's, known as bones from early mammals.
Good luck!
they are a threatened species
The digestive, circulatory,
respiratory and excretory systems interact in supplying matter and energy to
body cells and in removing waste. A minor malfunction in one of the systems
could lead to major malfunctions in others. It may eventually lead to cell
damage or death.
All the cells in the body need
oxygen( respiratory system) to maintain functioning--getting energy from food
(digestive system) ingested and removing the waste (excretory system). Also, the respiratory system and excretory
systems remove waste products such as carbon dioxide and urine and sweat. If it
fails, the body will lose homeostasis.
Methods developed to improve
efficiency and effectiveness of one system might help other systems preserve or improve functioning. If one system is
compromised it may be assisted with or replaced by developed methods preventing
it from accompanying damage to other systems.
I think the answer is B.)
Answer: Oligodendrocytes
Explanation: Oligodendrocytes form the myelin sheath around axons in the central nervous system.
