Answer: bone marrow
Explanation: Bone marrow is the soft, spongy tissue that is located in the medullary cavities (centers) of certain large bones. Healthy bone marrow is an essential part of the body, as it contains stem cells that produce blood cells and the cells that make up the immune system.
Answer: temperature and
Explanation: temperature and
and humidity the most essential factor affecting the speed of sound in gas.. in gas, sound speed changes with change in temperature. For stable temperature, the speed of sound is independent of pressure. For every increase in temperature, there is a corresponding increase in thermal energy as molecules do resonate faster. Humidity has little effect on the speed of sound. The speed of sound also depends on d relationship between molecules in gas