Question

Which of the following organs in mammals does not consist of a central medullary region surrounded by a cortical region?

• A. Liver
• B. Adrenal
• C. Ovary
• D. Kidney

Answer 1

The correct option is A Liver

Structure of ovary:

Ovaries are divisible into two regions:.

• The outer cortex containing graafian follicles at different stages of development.
• The inner medulla which is vascular in nature.

Structure of Adrenal gland :

Adrenal is divisible into the outer cortex and inner medulla. The two regions of adrenal gland produce different hormones.




Structure of liver:

Liver is not differentiated into cortex and medulla. Internally, the liver consists of lobules which are its functional units. Lobules are hexagonal in shape and consist of chains of liver cells (hepatocytes) radiating from the central vein.


Structure of kidney:

Kidneys are bean-shaped organs internally divided into three regions:

• Renal cortex
• Renal medulla
• Renal pelvis

Final answer: c. Liver