The system you're looking for should be "digestive system".
This organ system consists of organs such as mouth, stomach, intestines etc.
Basically, how this system works is that it breaks down complex and insoluble food molecules by using enzymes (chemical digestion) , into simple and soluble molecules which can be absorbed by the body and be turned to energy for our body to work. Examples of chemical digestion is such as enzyme lipase digesting lipids into fatty acids and glycerol. In addition, physical digestion (without enzymes) is also used to help speed up chemical digestions. Examples of physical digestion is where we chew the food we eat into a bolus, which can increase the surface area of the food and the enzyme digestion later on can be faster and more efficient.
The answer is A
Using energy
A normal range in adults is generally considered to be 4.35 to 5.65 million red blood cells per microliter (mcL) of blood for men and 3.92 to 5.13 million red blood cells per mcL of blood for women. In children, the threshold for high red blood cell count varies with age and sex.
Answer:
Ecosystem distribution
Explanation:
<u>The placement of biomes throughout the earth as a result of climatic factors such as temperature and precipitation is referred to as ecosystem distribution.</u>
Biomes generally represents a community of living organisms that are able to tolerate the climate of a place based on shared attributes. For example, all plants in the desert biomes are able to withstand low water.
An ecosystem refers a collection of different communities of organisms that are interacting with one another and their physical environment as a form of system.
Climatic factors such as temperature and precipitation delimits species distribution in an environment. Communities that are able to tolerate similar climatic conditions are placed in the same ecosystem. Hence, we have the <em>forest ecosystem, desert ecosystem, marine ecosystem, freshwater ecosystem, etc.</em>
Guanine
cytosine
thymine
uracil
adenine
those are a few