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Yanka [14]
3 years ago
11

What is the gateway to the digestive system?

Biology
2 answers:
gtnhenbr [62]3 years ago
7 0
The esophagus then releases the food into the stomach and a valve, or sphincter, acts as a gateway to keep the food from going back up into the esophagus. Stomach. In the stomach, our food is sterilized and further broken down.
timurjin [86]3 years ago
6 0

Answer:

Lower esophageal sphincter.

Explanation:

The gateway to the digestive system is lower esophageal sphincter. This ring like muscle open

and closes the passage between our esophagus

and our stomach, as needed. During the digestive process, the sphincter relaxs and lets food pass into our stomach.

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What means RNA and it shape in the biology
MaRussiya [10]

The Answer is ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins, although in some viruses RNA rather than DNA carries the genetic information.

RNA is typically single stranded and is made of ribonucleotides that are linked by phosphodiester bonds.

I hope this helps you:)

5 0
3 years ago
Read 2 more answers
Please help me i don’t understand
Eddi Din [679]
1. Biogeography, the study of the geographic distribution of plants, animals, and other forms of life. It is concerned not only with habitation patterns but also with the factors responsible for variations in distribution.

2. weathering and other natural forces break down the substrate, rock, enough for the establishment of certain hearty plants and lichens with few soil requirements, known as pioneer species. These species help to further break down the mineral-rich lava into soil where other, less hardy species can grow and eventually replace the pioneer species. In addition, as these early species grow and die, they add to an ever-growing layer of decomposing organic material and contribute to soil formation. This process repeats multiple times during succession. At each stage, new species move into an area, often due to changes to the environment made by the preceding species, and may replace their predecessors. At some point, the community may reach a relatively stable state and stop changing in composition. However, it's unclear if there is always—or even usually—a stable endpoint to succession.

3. I don’t have the video so I’m going to take. Wild guess. Just look up types of finches

4. Broadly speaking, different species are unable to interbreed and produce healthy, fertile offspring due to barriers called mechanisms of reproductive isolation.
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I tried my best hope this helps :)
6 0
3 years ago
Which of these questions is scientific?
erastova [34]

Answer:

Hi elmo!

Explanation:

ANd i think the answer is C!

hope this helps c:

8 0
3 years ago
Which of the following correctly describes the structure and function of tissue layers found in blood arteries and veins?
Paladinen [302]

Answer:

Explanation:

Tunica media; contains connective tissue that provides structural support  

3 0
3 years ago
Please provide a legitimate answer and provide an explanation for the question below.
UNO [17]

Answer:

The skeletal system is vital in supporting the immune system because : Bones contain marrow, a porous material which creates both white and red blood cells. This replenishment of cells allows the body to fight and expel harmful bacteria, environmental toxins,  foreign material e.t.c.

The white blood cells formed by the marrow are instrumental in isolating and destroying harmful particles (either on the site or in lymph nodes), or transporting them to the kidneys or bowels for excretion.

NOTE : Some people have marrow disorders which prevent their marrow from forming new cells; this is caused most often by cancer. Today, it is possible to transplant marrow from a healthy individual to a sick patient, and so help their bone marrow form new white and red blood cells to fight their sickness.

I hope it helps :)

6 0
3 years ago
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