What is the excretory structure of Planaria?
Flame Cells of Planaria Planaria are flatworms that live in fresh water. Their excretory system consists of two tubules connected to a highly-branched duct system that leads to pores located all along the sides of the body. The filtrate is secreted through these pores.
What is excretory organ in platyhelminthes?
The excretory organs of flatworms (Platyhelminthes) are flame cells and function like a kidney, removing waste materials. Nephridia remove metabolic wastes from an animal’s body.
Is function of Spermatheca in earthworm?
Its purpose is to receive and store sperm from the male or, in the case of hermaphrodites, the male component of the body. Spermathecae can sometimes be the site of fertilization when the oocytes are sufficiently developed. The spermathecae receive and store the spermatozoa of another earthworm during copulation.
Which one does not occur in earthworm?
So the correct answer is ‘Macronephridia’.
How many Spermathecae are in cockroach?
Four pairs
How many segments are present in cockroach stomach?
10 segments
Which structure is absent in female cockroach?
anal style
How many spiracles are present in cockroach?
10 pair
Do cockroaches have noses?
Roaches’ heads house their eyes, antennae and mouthparts. The other is that roaches don’t breathe through a nose or mouth. Instead, they draw air through spiracles, or holes in their sides.
Are cockroaches male or female?
Adult: The adult American cockroach is reddish brown with a pale brown or yellow band around the edge of the pronotum. The males are longer than the females because their wings extend 4 to 8 mm beyond the tip of the abdomen. Males and females have a pair of slender, jointed cerci at the tip of the abdomen.
What are spiracles Where are they present in cockroach?
Spiracles or stigmata are special valve containing tubules through which atmospheric air enters and escapes out during gaseous exchange in cockroach. Spiracles are 20 in number, out of these 2 pairs are found in thoracic portion while rest 8 pairs are found in abdominal portion.
Which structure of man is similar to Spiracle of cockroach?
nostrils