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.
Mating can occur at any time during the warmer months of the year. Cavorting typically occurs at night. Life Span and Reproduction The average life span of an eastern cottontail in the wild is usually less than three years. In captivity, though, a cottontail rabbit can live up to eight years.he eastern cottontail rabbit is one of the most common mammals of both the natural and the human generated ecosystems of North America. It is especially abundant in habitats that contain edges of open, grassy fields and thorny or shrubby cover.