Cells that move throughout the sponge to deliver food to the organism's cells are

In an open circulatory system, the blood is not enclosed in blood vessels but is pumped into an open cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid. In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again.Īs opposed to a closed system, arthropods– including insects, crustaceans, and most mollusks– have an ‘open’ circulatory system. In all vertebrate organisms, as well as some invertebrates, this is a closed-loop system, in which the blood is not free in a cavity. The circulatory system is effectively a network of cylindrical vessels: the arteries, veins, and capillaries that emanate from a pump, the heart. Simple diffusion allows some water, nutrient, waste, and gas exchange in animals that are only a few cell layers thick however, bulk flow is the only method by which the entire body of larger, more complex organisms is accessed. The circulatory system is the primary method used to transport nutrients and gases through the body. The information below was adapted from OpenStax Biology 40.1 Describe the process of gas, nutrient, and fluid exchange between capillaries and tissues.

Cells that move throughout the sponge to deliver food to the organism

Describe and identify the functions of the different components of blood.

Identify and describe the functions of different types of blood vessels (artery, arteriole, capillary, venule, vein), including their basic structure.

Compare and contrast the organization/function of circulatory systems, including gastrovascular cavity, open, closed, single, and double systems.

Cells that move throughout the sponge to deliver food to the organism's cells are