Answer
Verified
405.3k+ views
Hint: Closed circulatory systems (evolved in echinoderms and vertebrates) 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. Blood flow is not sluggish.
Complete Answer:
- The circulatory system is effectively a network of cylindrical vessels (arteries, veins and capillaries) that emanate from a pump (the heart). The circulatory system can either be open or closed, depending on whether the blood flows freely in a cavity or is contained in vessels.
- Open circulatory systems (evolved in insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. The resulting blood flow is sluggish.
- In all vertebrate organisms, as well as some invertebrate organisms, there is a closed-loop system in which the blood is not moving freely in a cavity. In a closed circulatory system, blood is contained inside blood vessels, circulating unidirectionally from the heart around the systemic circulatory route, then returning to the heart again, blood circulates through a series of vessels of varying diameters.
Therefore the correct option is D.
Additional information: In contrast to a closed system, arthropods (including insects, crustaceans and mollusks) have an open circulatory system. In an open circulatory system, the blood is not enclosed in the blood vessels, but is pumped into a cavity called hemocoel.
- The blood is called hemolymph because it mixes with the interstitial fluid. As the heart beats, and the animal moves, the hemolymph circulates around the organs with the body cavity, re-entering the heart through openings called ostia. This movement allows for gas and nutrient exchange.
- An open circulatory system does not use as much energy to operate and maintain as a closed system; however, there is a trade-off with the amount of blood that can be moved to metabolically-active organs and tissues that require high levels of oxygen.
- In fact, one reason that insects with wing spans of up to two feet wide (70 cm) are not around today is probably because they were outmatched by the arrival of birds 150 million years ago. Birds, having a closed circulatory system, are thought to have moved more agilely, allowing them to obtain food faster and possibly to prey on the insects.
Note: In closed circulatory systems, the heart pumps blood through vessels that are separate from the interstitial fluid of the body. Most vertebrates and some invertebrates such as annelid earthworm have a closed circulatory system.
Complete Answer:
- The circulatory system is effectively a network of cylindrical vessels (arteries, veins and capillaries) that emanate from a pump (the heart). The circulatory system can either be open or closed, depending on whether the blood flows freely in a cavity or is contained in vessels.
- Open circulatory systems (evolved in insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. The resulting blood flow is sluggish.
- In all vertebrate organisms, as well as some invertebrate organisms, there is a closed-loop system in which the blood is not moving freely in a cavity. In a closed circulatory system, blood is contained inside blood vessels, circulating unidirectionally from the heart around the systemic circulatory route, then returning to the heart again, blood circulates through a series of vessels of varying diameters.
Therefore the correct option is D.
Additional information: In contrast to a closed system, arthropods (including insects, crustaceans and mollusks) have an open circulatory system. In an open circulatory system, the blood is not enclosed in the blood vessels, but is pumped into a cavity called hemocoel.
- The blood is called hemolymph because it mixes with the interstitial fluid. As the heart beats, and the animal moves, the hemolymph circulates around the organs with the body cavity, re-entering the heart through openings called ostia. This movement allows for gas and nutrient exchange.
- An open circulatory system does not use as much energy to operate and maintain as a closed system; however, there is a trade-off with the amount of blood that can be moved to metabolically-active organs and tissues that require high levels of oxygen.
- In fact, one reason that insects with wing spans of up to two feet wide (70 cm) are not around today is probably because they were outmatched by the arrival of birds 150 million years ago. Birds, having a closed circulatory system, are thought to have moved more agilely, allowing them to obtain food faster and possibly to prey on the insects.
Note: In closed circulatory systems, the heart pumps blood through vessels that are separate from the interstitial fluid of the body. Most vertebrates and some invertebrates such as annelid earthworm have a closed circulatory system.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Why Are Noble Gases NonReactive class 11 chemistry CBSE
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
At which age domestication of animals started A Neolithic class 11 social science CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Write a letter to the principal requesting him to grant class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE