Capillaries are where fluids, gasses, nutrients, and wastes are exchanged between the blood and body tissues by diffusion. Capillary walls contain small pores that allow certain substances to pass into and out of the blood vessel.apillaries measure in size from about 5-10 microns in diameter. Capillary walls are thin and are composed of endothelium (a type of simple squamous epithelial tissue). Oxygen, carbon dioxide, nutrients and wastes are exchanged through the thin walls of the capillaries.
Quick Answer. Cottontail rabbits are herbivorous animals that will eat nearly any plant or vegetable that they can get. They do not prefer any type of plant compared to others; but they will tend to eat more of certain things, such as grass or bark, depending on the season that it is. Continue Reading.
Most rabbits will eat any kind of hay but it can be useful to try different kinds to encourage picky eaters or simply to introduce some variety into your rabbit's diet...19.rass can be fed ad lib to your rabbit and letting your rabbit graze on your lawn is a natural way for it to receive the high fibre diet it needs. If you have no garden or lawn, you can pick handfuls of grass from parks or roadsides to feed your rabbit but wash it thoroughly first.