Question

Which of the following organs in mammals do not consist of a central ‘medullary’ region surrounded by a cortical region?
(a) Ovary
(b) Adrenal
(c) Liver
(d) Kidney

Answer 1

Hint: This organ is only found in vertebrates and removes the toxicity of various metabolites and synthesizes proteins. It also produces biochemicals necessary for digestion and growth. It is present in the right upper quadrant of the abdomen below the diaphragm.

Complete answer:
The liver doesn’t consist of a central ‘medullary’ region surrounded by a cortical region. It has 500 different functions and mainly filters the blood coming from the digestive tract and plays a vital role in immune function. It also makes and stores energy by producing proteins and vitamins A, E, and K. It is next to the skin and is the second biggest organ in the body. A maximum of 10 % of the blood of the body can be held in the liver and it can pump 1.5 liters per minute. The liver can regenerate with just 25 percent left in the body and usually takes 2 weeks to completely regenerate. In the early stages, the liver is infected, there are no symptoms to indicate that it is infected and some diseases are hepatitis and cirrhosis.

So, the correct answer is 'Liver'.

Note: The composition of connective tissue known as the stroma makes up the solid organ ovaries. The stroma is supported by an outer ovarian cortex and central medulla. The adrenals are conical, yellowish bodies and are endocrine glands that produce a variety of hormones. It has two different regions known as the adrenal cortex and adrenal medulla. Kidneys filter the blood and the outer region of the kidney is called the renal cortex and the inner region is known as the renal medulla.