Changes

!

!

<h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Article of the Week - [[Stomach and Abomasum - Anatomy & Physiology|The Stomach of the Ruminant]]</h2>

<h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Article of the Week - [[Diffusion - Physiology]]</h2>

|-

|-

|style="color:#000;"|

|style="color:#000;"|

[[Image:Abdomen development young cow.jpg|thumb|right|150px|Abdominal development of a young cow - Copyright Prof.Pat Mccarthy]]

Gases or liquids can be unevenly distributed between two areas. If one area has a higher concentration than the other then the differance between these two areas is termed the concentration gradient. The equality is then corrected by the movement of the molecules down this so called gradient from the region of high concentration to that of low. This process is passive as the molecules do not have to be forced to do this and it is reffered to as diffusion.  

The microorganisms in the ruminant stomach also synthesise all of the B vitamins, vitamin C and vitamin K. Vitamin synthesis in the rumen is sufficient for growth and maintenance. Only vitamins E, D and A should be provided in the ruminant diet. Under normal conditions, ruminants will not require B vitamins added in the diet. Cobalt is needed for vitamin B12 synthesis and so cobalt should be provided in the diet or vitamin B12 injected directly into the bloodstream. In stress conditions, vitamin B3 (Niacin) and vitamin B1 (Thiamine) may also need to be provided in the diet....

This works by the random thermal movement of molecules. If there is a gas present in an air tight room and then a door is opened into the next room where a lower concentration of the same gas is present the laws of probability state that more of the randomly moving molecules will escape through the door from the area of high concentration than will escape back through the door from the area of low and that eventually the concentrations in both rooms with be approximately the same. The net movement therefore will be from the room with a high concentration to that of a low concentration.  

[[Stomach and Abomasum - Anatomy & Physiology|Click here to read more]]

 

 

 

[[Diffusion - Physiology|Click here to read more]]

|}

|}

|-

|-