explain how pressure affect the normal functioning of the ff organs in the body. 1)body 2)cerebrospinal fluid?

Question

3)eye 4)gastrointestinal system 5)skeleton 6)heat 7)respiration

Answer 1

Generally speaking at extremes of pressure if there is too much internal pressure, the organs go "POP" and if there is too much external pressure, the organs go "SQUISH"

Any tube with too much external pressure may block and cause effects at one end with the build up of what should go through the tube and at the other end with a lack of what should come through the tube.

(1) The body ...
The body requires all sorts of normal values of pressure in all sorts of areas to keep it functioning - to keep your skin from falling apart, to keep your lungs expanding and contracting with chest wall/diaphragmatic movements, to keep blood pumping around and supplying oxygen and nutrients to the organs of the body

(2) CSF ...
CSF is manufactured by the choroid plexus of the brain in the lateral ventricles. It flows down into the third ventricle and into the fourth ventricle and then circulates around the spinal cord, eventually entering the venous system by means of arachnoid granulations. If external pressure blocks this flow, then a buildup of CSF in the lateral ventricles occurs. This is called Hydrocephalus. Hydrocephalus is bad.

Pressure is also important with regard to the amount of oxygen and nutrient delivery to the brain. Perfusion pressure of the brain PP = Mean Arterial Pressure - Intracranial Pressure

PP = MAP - ICP

Raised ICP is bad

(3) Eye - the aqueous humour of the anterior chamber of the eye is formed by coarse plasma filtration of blood in the ciliary body and drains away through the trabecular meshwork and into the canal of Schlemm which lie within the angle of the anterior chamber. Schlemm is good. Normal pressure within the anterior chamber of the eye helps keep the globe inflated and everything in the right place. Blockage of this flow (something pushing the iris forward and blocking the angle, for instance) can lead to a raised pressure in the anterior chamber of the eye and a rise in intraocular pressure. This condition is called Glaucoma - specifically this is acute angle closure glaucoma. Glaucoma is bad.

(4) GIT is a tube. Pressure in the GIT is used to push the fluid bolus from the mouth down the oesophagus (gullet) and into the stomach. Pressure with the lower oesophageal sphincter keeps the fluid in the stomach while the stomach contracts and churns and mixes food with gastric acid. Pressure then moves food along through the intestines to be further digested. This pattern of pressure is called Peristalsis.

Blockage of the GIT follows the general pattern of blockage of a tube described earlier. Bowel obstruction is bad. Also abnormal pressures in the GIT can lead to diverticular disease.

(5) Skeleton
Bones are used to having pressure put on them every time we sit, stand or lie down. Osteocytes in their little lacunes within the bone manufacture the bone matrix and they form a trabecular meshwork in response to the pattern of stress or force they feel. ie they respond to local pressure.

(6) Heat increases pressure
P1xV1 / T1 = P2xV2 / T2 {universal gas equation}

I guess you mean Heart
The heart's function is ALL about pressure. It generates blood pressure. It perfuses the body. It drops its pressure internally to reload the ventricle with more blood.

(7) Respiration
I guess you mean ventilation

The lungs are all about pressure too. As the diaphragm and chest wall expand - the lung walls follow and the lungs expand. This creates low pressure inside the lungs and air moves IN. The opposite occurs when you breath out.

If you are really talking about Respiration then you need to understand about gas exchange and how gases move down a concentration gradient governed by their partial pressures