Annelids have a(an) ____ circulatory system, in which blood is contained in a network of blood vessels.
User: Annelids have a(an) circulatory system, in which blood is contained in a network of blood vessels.Annelids have a CLOSED circulatory system, in which blood is contained in a network of blood vessels.nnelids have a CLOSED circulatory system, in which blood is contained in a network of blood vessels. Best Answer: Annelids have closed circulatory systems, which means that blood is always contained by blood vessels. Some mollusks and arthropods, on the other hand, have open circulatory systems, which means that at some time, blood from the heart will pump into the hemocoel or blood cavity.n Annelids, the blood vessels end up with capillaries. Hence called closed BVS. In cockroach it is open BVS as blood vessels don't end up with capillaries. Hence, the blood vessels bluntly open into body cavities. NOTE: Circulatory system is also called BVS. Closed circulatory system Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness.In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities. Open circulatory system The open circulatory system is common to molluscs and arthropods.Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.pen circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.   . system in which blood is not always contained within a network of blood vessels, blood flows to various body cavities so that the cells are in direct contact with the blood.  . system in which blood is not always contained within a network of blood vessels, blood flows to various body cavities so that the cells are in direct contact with the blood. Report Abuse. Just flowing of blood in blood vessels is called closed blood vascular system. When blood vessels end up with capillaries, then only we have to call it as closed Blood Vascular System (BVS). In Annelids, the blood vessels end up with capillaries.Hence called closed BVS.In cockroach it is open BVS as blood vessels don't end up with capillaries. Hence, the blood vessels bluntly open into body cavities. NOTE: Circulatory system is also called BVS.n Annelids, the blood vessels end up with capillaries. Hence called closed BVS. In cockroach it is open BVS as blood vessels don't end up with capillaries. Hence, the blood vessels bluntly open into body cavities. NOTE: Circulatory system is also called BVS. Circulatory System: Mollusca. Most animals within the Mollusca Phylum have an open circulatory system. Cephalopods have a closed circulatory system. Within a open circulatory system blood is not restricted to circulating within the blood vessels.lug's and Snail's have a very similar circulatory system. The fluid that is transported through the circulatory system of a Slug is called hemolymph. Hemolymph is a fluid in the circulatory system and is similar to the fluids and cells making up both blood and interstitial fluid including water, proteins, and fats. While humans, as well as other vertebrates, have a closed cardiovascular system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open cardiovascular system.wo types of fluids move through the circulatory system: blood and lymph. The blood, heart, and blood vessels form the cardiovascular system. The lymph, lymph nodes, and lymph vessels form the lymphatic system. Other organisms have a closed circulatory system where transport is contained within a closed circuit of vessels. This type of system is common among larger organisms, including humans, and has many advantages, including quicker and more controlled movement of blood.lood then freely flows back into vessels that direct the blood back to the heart. Overall, you could describe an open circulatory system as being more free flowing and passive. There are many organisms that have open circulatory systems, including grasshoppers, snails and clams. Open circulatory systems which have evolved through species such as crustaceans, insects, mollusks, and other invertebrates, pump blood into a hemocel with the blood extending back to the circulatory system betweens the various cells.lug's and Snail's have a very similar circulatory system. The fluid that is transported through the circulatory system of a Slug is called hemolymph. Hemolymph is a fluid in the circulatory system and is similar to the fluids and cells making up both blood and interstitial fluid including water, proteins, and fats. In a closed circulatory system, the blood leaves the heart, travels in a closed circuit circle and re-enters the heart. In comparison, in an open circulatory system, blood leaves the heart through open-ended vessels and more passively flows back to the heart.lood then freely flows back into vessels that direct the blood back to the heart. Overall, you could describe an open circulatory system as being more free flowing and passive. There are many organisms that have open circulatory systems, including grasshoppers, snails and clams.
Closed