What organs and structures are contained in the thoracic cavity? What are the different parts of the heart and of the vessels that go between the heart and the lungs? What structure is also known as the pacemaker of the heart? What structures receive arterial blood from the brachiocephalic art...
What structures in the cardiovascular system connect arteries to veins? What organ system maintains blood oxygen and carbon dioxide levels? Which type of muscle tissue is found in visceral organ? Which circuit of the cardiovascular system includes the left ventricle and aorta?
While it doesn't emit, absorb, or reflect light, we know dark matter exists because of the way its gravity affects visible matter. Galaxies rotate faster than they should based on the mass we can see, and large-scale structures in the universe form in patterns that only make sense if the...
In terms of operational factors, point of care 3D printing can help to improve general problems for hospitals and other clinical settings, from reducing the risk of revision surgeries through personalized models, to increasing the choice of bioprinting options through different structures that are compa...
They found that lower hormone levels lead to plant materials with more rounded, open cells of lower density(密度), while higher hormone levels contribute to the growth of plant materials with smaller but denser cell structures. Lower or higher density...
What mattered most was the residents' physical health and mental status. 出自-2016年6月阅读原文 What kind of care facility old people live in may be less important than we think. 出自-2016年6月阅读原文 What government has not yet found is the political will to put that understanding into ...
Arteries function to deliver blood throughout the body. There are two main types of arteries: elastic and muscular arteries. Elastic arteries get their name because they are able to expand more easily compared to muscular arteries, and elastic arteries are found closer to the heart (ex: aorta)...
One of the reasons for its success is that science has built-i,error-correcting machinery at its very heart.Some may consider this an overbroad characterizatio,but to me every time we exercise self-criticis,every time we test our ideas against the outside worl,we are doing science.When ...
cells within the utricle and saccule and otoliths (tiny structures that trigger the hair cells in response to movement), make up the vestibular system. This system provides instantaneous feedback to the brain, along with vision and proprioception receptors in the body, regarding our position in ...
题源:Elephants are known to use a wide variety of calls, many of them infrasonic ( below the level of human hearing in coordinating group behavior. The infrasonic calls usually have a component that is humanly audible, but these higher frequency aspects of th...