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.
The Eastern Cottontail is a common mammal that can be seen year-round. It has grayish-brown fur, with a reddish-brown neck, and a white tail. Eastern Cottontails are easily recognized by their long ears. This rabbit usually lives in brushy areas where it can hide.ost rabbits live about a year. Some predators of Eastern Cottontails are raccoons, foxes, hawks, owls, crows, snakes, opossum, cats, and dogs. Copyright, John White. Eastern Cottontails breed frequently. The males fight each other during breeding season, and do a dance for the females.