Describe the flow of blood in the human body, including through each of the four chambers of the heart.hey...can someone help me with this lol, i dont really know.

Answers

Answer 1

Answer: Well , the humans have a closed double circulatory system as the blood passes by the heart twice per one cycle and doesn't leave the blood vessels like in insects.
》Pulmonary circulation : Blood is circulated to the lungs where it is oxygenated.
》Systemic circulation : Blood is circulated through all the other parts of the body where it unloads oxygen.

Oxygenated blood coming from the lungs enters the heart through the pulmonary vein which takes blood to the first chamber it meets ; the Left atrium. Left atrium pumps blood to the second chamber , which is left ventricle and during this time , the semi lunar valves are closed to prevent back flow of blood and the bicuspid valve will be open . Now , the left ventricle is filled with oxygenated blood so it will pump this blood to the whole body via the largest artery which is Aorta.
Oxygenated blood will unload oxygen to cells in need of it and will return back now to the heart as deoxygenated . This deoxygenated blood will enter the heart through superior and inferior vena cava which will take the blood to the third chamber , right atrium . Right atrium will pump blood to right ventricle so the semi lunar valves will be closed during this time and the tricuspid will remain open. Now that the fourth chamber is filled with deoxygenated blood , it will pump this blood through pulmonary artery when the semi lunar valves opens , to the lungs again to be oxygenated once more.

Notice that you have to know exactly the position of the valves that I have mentioned in the heart so that you could understand the blood flow better. You can refer to any heart labelled diagrams in your textbook or the internet.

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*PLEASE ANSWER A, B AND C* THANK YOU!During an investigation into muscle strength, a group of students planned to compare their bicep muscles. Each student planned to lift a variety of masses, until they found the largest mass that they could lift. The masses were 5, 10, 15, 20 and 25 kg. The students would then plot a graph of their results.
a) Suggest how the students could improve the reliability of the investigation.

b) Suggest how the students could improve the accuracy of the investigation.

c) The teacher told the students that their investigation was too dangerous. Suggest why.

Answers

Answer:

A) They could re-test the largest mass they could lift and see if the results are accurate.

B) They test it everyday and test if it is the average they can lift daily, instead of just one time or a couple times in one day.

C) They might lift to much , because they don't know how much they can lift at once. They might over lift and hurt themselves. There are many more ways they could hurt themselves , but that is one example.

Hope this helps :)

The answer is B because they only wanted results

Which of the following mechanisms is NOT a way that a carbon atom could enter the atmosphere?Combustion
Decomposition
Photosynthesis
Respiration

Answers

Carbon can enter environment through various ways. It can be respiration, combustion and decomposition. The process of photosynthesis does not release carbon to the environment.

What is photosynthesis?

The process by which plants produces their own food i.e., glucose in presence of sunlight and chlorophyll, using carbon dioxide and water. Its equation can be written as

$6CO_(2) +6H_(2) O(Sunlight)/(Chlorophyll) > C_(6) H_(12)O_(6)+6O_(2)$

Thus, it can be concluded as among the given options, photosynthesis is the process that do not release carbon in environment.

For more information about photosynthesis, visit:

brainly.com/question/1388366

Answer:

photosynthesis

Explanation:

Which statement describes a disadvantage of nonrenewable resource?

HURRY

Answers

Answer:

it is difficult to change the habit of using the resource

Explanation:

Gasoline for example is a convenient energy source and because it is convenient and relatively cheap it is hard to stop using it.

Answer:

Explanation:

It is difficult to change the habit of using the resource.

Which of these describes one of the functions of the nervous system?a)providing the cells of the body with energy
b)sensing changes in the external environment
c)removing waste materials from the body
d)transporting nutrients throughout the body

Answers

The correct answer in your case would be B - sensing changes in the external environment. Our sensory apparatus ( our eyes, nose, taste, hearing) all help and contribute towards the detection of changes that could be found in the external environment. All of these changes get transmitted and processed in the brain and nervous system in general.

A) neurons in the brain are communitive via and has an electrical impulse and is neurotransmitters specialized cells known as neurons transmits signals to different parts of the body

What advantages of being an invertebrate over a vertebrate?

Answers

Their exoskeleton is stronger that just skin. they are much more flexible than vertebras. If they break a body part it will grow back over time.

A(n) ____ can be used to trace the flow of energy through an ecosystem?

Answers

Food Chain would be a suitable answer... and a Food Chain is a bunch of food chains connected.

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