Solid organs are those which have fixed shape and dimension and also devoid of any space within them. They are not hollow internally. These include
Most major organs in our body are hollow in nature. But some of the prominent ones are solid in nature. They are so based on their functional requirements.
See the list of hollow organs before you process for a better idea.
List of Solid Organs in Human Body
The liver is the largest organ of the body, located in the right portion of the upper abdominal cavity.
It is made of hepatocytes and consists of blood vessels, blood, biomolecules and other substances.
It is made of four lobes and stores bile in the gall bladder.
This liver has many functions like the synthesis of substances like lipoproteins, plasma proteins. It also stores glucose as glycogen and helps in the metabolism of substances in the body.
Kidneys are a pair of major organs located in the dorsal portion of the body, one on either side of the vertebral column.
They are fully filled with kidney mass consisting of nephrons and other structures.
These nephrons help to filter the blood and remove the waste matter out in the form of urine.
The pancreas is another important organ in the abdomen that is solid in nature.
As you can see in the image, it is located in the space between the stomach and the duodenum.
It is made of clusters of cells called acini and in between, the islets of Langerhans cells are present.
There is a pancreatic duct at the center running through its mass which opens into the duodenum.
This pancreas secretes hormones like insulin and glucagon, regulating blood sugar levels and digestive enzymes to digest food in the intestine.
The spleen is an organ present to the left of the stomach in the upper portion of the abdomen.
It is made of reticular endothelial cells. It is the site of blood storage and also the destruction of worn-out red blood cells.
The thyroid is an endocrine gland that is filled with a mass of glandular secreting tissue. It is located in the front of the neck and butterfly-shaped.
It secretes thyroid hormones T3, T4 and calcitonin, which play a major role in body physiology.
The tongue is muscular tissue located in the mouth. It is a flexible organ in the movements. But it has a fixed shape without any empty spaces within it.
It helps in speech and mastication of food.
A pair of ovaries are present in the female human body are solid in nature. They are made of germinal cells.
They produce the ova and also hormones like estrogen and progesterone.
Other organs that are solid in nature
The brain is the largest and important organ. It is completely solid in nature but has ventricles through which the cerebrospinal fluid flow. It is not hollow in nature based on its physiology, like the lungs or heart. But, it has cavities for the purpose of nutrient supply.
This brain regulates whole-body physiology.
Difference between hollow and solid organs
|Feature||Hollow organs||Solid organs|
|Space||They have empty space inside them||They do not have empty spaces inside them|
|Role||The empty space helps in physiology and functions||solid mass of tissue is needed for their physiology in the body.|
|Examples||Heart, stomach, intestines||Liver, kidney, spleen.|
Is lung a Hollow organ?
We notice that lungs expand on inhalation and constrict on exhalation. But they are not hollow inside with empty space like a balloon. They have several branches of bronchioles and lobules inside them.