The interphase is the stage that cells are in the longest.
I don’t really understand this question can you go more into detail
Answer:
here.
Explanation:
Homeostasis is keeping internal body conditions near constant.
Now let's apply this to cleaning our room:
for example, if it's a mess, no one will really tolerate inhabiting it. Same with our body. For our bodies to function, everything needs to be ordered, all the chemical reactions need to happen at a certain rate at a certain time.
Let's for example talk about your room's temperature, if it gets too hot, you're going to switch on the fan and if it gets too cold, you'll hide under a blanket. And you will do this so that you're comfortable enough to carry on with what you do.
Same for our body, if it gets too hot, your body, via negative feedback, will be able to lower it's temperature such that the chemical reactions, keeping you alive, occur at an appropriate rate without enzyme denaturation.
Cleaning up your room from all the dirt is like excreting all the waste products that gives your body a healthy balance. Eg: the carbon dioxide you excrete when you breathe out is important because if it remains in your blood, the blood's ph will drop, which'll affect the rate of chemical reactions. Similarly if the dirt in your room accumulates it's going to smell bad.
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.