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Ksju [112]
2 years ago
12

Which helps to maintain a normal range of on Earth.

Biology
2 answers:
saveliy_v [14]2 years ago
6 0
The greenhouse effect.
MariettaO [177]2 years ago
4 0
<span>The greenhouse effect. The Green House effect increases the temperature of the Earth by trapping heat in the Earth's atmosphere. This keeps the temperature of the Earth higher than it would be if it were being directly heated by the Sun, if the Sun were the only source of heat.</span>
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At what point do the pulmonary and systemic circulation systems meet up?
Hitman42 [59]

Answer: The Heart

Explanation:

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The “trunk” – the main artery (aorta) – branches into large arteries, which lead to smaller and smaller vessels. The smallest arteries end in a network of tiny vessels known as the capillary network.

There are two types of blood circulatory system in the human body, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.

Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries.

In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products. The blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.

This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. Below is an attachment of a diagram that explains the connection between pulmonary and systemic circulation from google.

5 0
3 years ago
Which statement best describes a dominant allele
sweet [91]

Answer:

B The version of the trait that is expressed over other alleles for the same trait I believe

5 0
3 years ago
Read 2 more answers
To ensure that their results are not due to chance, scientists will usually carry out an experiment a number of times, a process
serg [7]
Rolling a die multiple times to see the average.
3 0
3 years ago
What organisms save water by turning carbon dioxide into a special carbon compound before carrying out photosynthesis?
larisa [96]

The correct answer is C4 plants.  

A plant that cycles carbon dioxide into four-carbon sugar components to get into the Calvin cycle is known as a C4 plant. These plants are very effective in dry, hot climates and produce ample energy. Various foods one consumes are C4 plants like pineapple, corn, and sugar cane.

In the C4 plants, at the start carbon fixation occurs in the mesophyll cells and the Calvin cycle occurs in the bundle-sheath cells. The PEP carboxylase combines with an incoming molecule of carbon dioxide to the three carbon-molecule PEP, generating a four carbon molecule, that is, oxaloacetate.  


6 0
3 years ago
Every 24 hours, the Earth completes two rotations on its axis.<br> True or False
timama [110]
False each day is 24 hours 

6 0
3 years ago
Read 2 more answers
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