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.
Wild rabbits Wild rabbits spend much of their time foraging in meadows and fields eating wild grasses, herbs, flowers, leaves, and twigs. They also consume some fruits, vegetables, and grains as they come across them, but these do not make up a large part of their diet.They get much of the water they need from the fresh leaves and grasses they eat. Rabbits mostly eat lettuce, carrots and vegetables. Rabbits eat grass because they don't have sharp teeth.Pet rabbits Pet bunnies require a special diet high in fibre, moderate in proteins, low in fats, calcium, and sugar, and with the right mix of vitamins and nutrients.hey also consume some fruits, vegetables, and grains as they come across them, but these do not make up a large part of their diet. They get much of the water they need from the fresh leaves and grasses they eat. Rabbits mostly eat lettuce, carrots and vegetables. Rabbits eat grass because they don't have sharp teeth.