yes, it is small(24 atoms) and has no charge
No it passes behind it. Only the oesophagus and vena cava pass through it, this is because they use the muscle qualities of the diaphragm as a sphincter and to aid blood and lymphatic return.
Systemic via the aorta - pulmonary via the pulmonary artery.
There are a set of 4 valves in the heart in a part of the heart called the "skeleton". These are the Mitral (a bicuspid), Tricuspid, Aorta, and the Semiliunar valves. There are valves in the veins which prevent back flow.
Secondary waves are transverse or shear waves which are able to pass through solids, but are not able to pass through liquids.
It allows blood to pass from the inferior vena cava to the aorta without ultilizing the lungs, since fetuses can't breath. If you had this is an adult heart, you would suffocate as you would not be able to use your lungs and you wouldn't be receiving oxygen from your mother.
My guess is that the starch and glucose mixture is supposed to represent the starch and glucose molecules in our body, and how only the smaller molecules can pass through the walls of the small intestines.
fine glucose molecules can pass through the wall of the visking tube.
Glucose is too big to pass throught.
Yes, microwaves can pass through walls, but their ability to do so depends on the material and thickness of the wall. For example, microwaves can easily pass through glass and thin walls, but may be blocked by thicker walls made of concrete or metal.
No, gases do.
It is not possible to vibrate at a speed that allows you to pass through walls. Walls are solid structures that cannot be passed through by vibrating at any speed.
by moving.
Glucose is permeable, meaning it can pass through cell membranes.
The three structures you are looking for are the Asophagus, the Descending Aorta and the Vena Cava. Do not fall for the trap placed be asking for three structures, which might lead you to include the trachea in place of the vena cava. The trachea bifrucates at the level of T4 where it enters the lungs, far above the thoracic diaphragm.
I read somewhere that it does not. perhaps because all of it is used up by the body cells.
The blood is pumped down the aorta and then into the renal artery. When the blood is deoxygenised, it is returned to the heart via the renal vein and later the vena cava.
radio and tv beams can pass through concrete as x-rays pass through the body