Enteronephric nephridia are a type of excretory organ found in earthworms and play a crucial role in eliminating nitrogenous waste products, such as ammonia and urea, from the body. These nephridia are part of the earthworm's excretory system and help maintain the osmotic balance and overall internal homeostasis of the organism.
So, the correct option is (B): Excretion of nitrogenous waste
Match List I with List II.
List I | List II | ||
A | Taenia | I | Nephridia |
B | Paramoecium | II | Contractile vacuole |
C | Periplaneta | III | Flame cells |
D | Pheretima | IV | Urecose gland |
Choose the correct answer from the options given below:
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
The current passing through the battery in the given circuit, is:
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
An earthworm is a terrestrial invertebrate that is to the phylum Annelida. They display a tube-within-a-tube body plan; they are externally subdivided with corresponding internal subdivision, and they usually have setae on all divisions. They arise worldwide where soil, water, and temperature allow.
Generally, earthworms are found in soil, eating a wide variety of organic matter. This organic matter incorporates plant matter, rotifers, nematodes, bacteria, living protozoa, fungi, and other microorganisms. An earthworm's digestive system runs the expanse of its body. An earthworm respires throughout its skin. It has a double transport system made up of coelomic fluid that goes within the fluid-filled coelom and a simple, closed circulatory system.
It has a nervous system - “central and peripheral”. Its central nervous system comprises two ganglia above the mouth, one on either side, connected to a nerve running along its length to motor neurons and sensory cells in each segment. Large numbers of chemoreceptors concentrate close to its mouth.
Read More: Reproductive System of Earthworm