In prawns, the excretory organs are known as antennary glands or green glands. These glands are opaque-white pea sized structures, enclosed in the coxa of each 2nd antenna. They mainly excrete ammonia.

Contractile vacuole is the excretory organ in Amoeba. It is also involved in osmoregulation.

(a) ANF Atrial Natriuretic Factor

(b) ADH Antidiuretic Hormone

(c) GFR Glomerular Filteration Rate

(d) DCT Distal Convoluted Tubule

Difference between glycosuria and ketonuria is as follows

Glycosuria	Ketonuria
The presence of glucose in urine is known as glycosuria. It occurs in diabetes mallitus.	Presence of abnormally high ketone bodies in urine is termed as ketonuria. Increase ketones in urine usually occurs at the time of longtime fasting.

Sebaceous glands are involved in the elimination of certain substances like cholesterol, squalene, triglycerides wax and esetrs through sebum. This secretion provides oily covering to the skin.