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.
What to Feed Your Rabbit. Large, unlimited amounts of fresh hay should be offered daily. Young bunnies should be introduced to hay as soon as they can eat on their own. Mixed grass hay or Timothy hay is preferred because it is lower in calories and calcium than alfalfa. Use a good quality, high fiber alfalfa or timothy based pellet as a small part of your rabbitâs diet. Feed a minimum of 1 cup vegetables for each 4 lbs. of body weight. Select at least three types of vegetables daily.