Which of the following is the character of dorsal blood vessel of eart...
In earthworms, the dorsal blood vessel is a tubular structure that runs along the top of the body and is responsible for distributing oxygenated blood throughout the body. It is located on the dorsal side of the body, which is the side facing upwards when the earthworm is crawling.
The dorsal blood vessel collects oxygenated blood from the gills, which are located in the first 13 segments of the earthworm's body. It then distributes the oxygenated blood to the rest of the body through a network of smaller blood vessels called capillaries.
Based on this information, the correct answer to the question is "distributing in the first 13 segments" (option D).
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Which of the following is the character of dorsal blood vessel of eart...
The character of the dorsal blood vessel of an earthworm is that it distributes blood in the first 13 segments of the body. Let's understand this in detail.
An earthworm has a closed circulatory system, which means that its blood is contained within blood vessels and does not directly come in contact with the body tissues. The main component of the circulatory system in an earthworm is the dorsal blood vessel, also known as the main blood vessel.
The dorsal blood vessel runs along the upper side of the body, extending from the anterior end to the posterior end. It is located above the digestive system and extends through multiple segments of the earthworm's body. The blood vessels that connect to the dorsal blood vessel are called lateral vessels.
Now, coming to the character of the dorsal blood vessel, it is responsible for distributing blood in the first 13 segments of the earthworm's body. This means that it supplies oxygen and nutrients to the tissues in these segments and collects waste products from them. The blood flows in a forward direction from the anterior end to the posterior end through the dorsal blood vessel.
However, it should be noted that while the dorsal blood vessel distributes blood in the first 13 segments, it does not collect blood from these segments. The blood collection in an earthworm is done by the ventral blood vessel, which is located on the ventral side of the body and collects blood from the last few segments.
In summary, the character of the dorsal blood vessel of an earthworm is that it distributes blood in the first 13 segments of the body. It plays a crucial role in supplying oxygen and nutrients to these segments and collecting waste products from them.
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