Which of the following has not the protonephridia as an excretory organ?

1. Rotifers

2. Amphioxus

3. Planaria

4. Earthworm

Which of the following is not the primary function of protonephridia?

1. Ionic volume regulation

2. Fluid volume regulation

3. Osmoregulation

4. Excretion

Annelids have which of the following excretory organs?

1.Nephridia

2.Protonephridia

3.Flame cells

4.All of these

Excretory function of crustacea is performed by

1.Antennal glands

2.Green glands

3.Both A and B

4.Malpighian tubules

The insects, the cockroach will have which of the following excretory structures?

1.Malpighian body

2.Malpighian corpuscles

3.Malpighian capsule

4.Malpighian tubules

Human excretory system does not involve

1.Urethra

2.Vestibule

3.Bladder

4.Kidneys

Kidneys are situated in

1.Between the last thoracic and 5th lumbar vertebra

2.Between the last thoracic and 3rd lumbar vertebra

3.Between the last thoracic and 2nd lumbar vertebra

4.Between the last thoracic and first lumbar vertebra

 Which of the following options shows the incorrect measurements of an adult human kidney?

1.10-12 cm in length

2. Kidney weigh 240- 340 g

3. Thickness of kidney is 2-3 cm

4. 5-7 cm in width

Medullary pyramids project into

1.Calyces

2.Medulla

3.Cortex

4.Both cortex and medulla

If one goes from inside to outside then which of the following parts comes first?

1.Hilum

2.Calyces

3.Pelvis

4.Cortex