The human body is made of many organs with different structures and functions. Of them, there are many hollow organs like
- Blood vessels (arteries and veins)
- Small intestine
- Large intestine
- Urinary bladder
- Fallopian tubules
These organs are hollow internally without any solid or liquid mass. This hollow structure inside them is necessary to perform important functions.
List of Hollow Organs in the Body
The heart is the pumping organ of circulation; it is a hollow organ with muscular walls. Anatomically it can be divided into 4 chambers as 2 auricles on the upper and 2 ventricles in the lower portion.
These 4 chambers are hollow and allow the fluid blood to flow through them.
On average, the heart pumps 70ml of blood for each stroke from its ventricles. So, combined with auricles, the entire volume inside the heart could be 140ml. But, this can be greatly enhanced during exercise.
Arteries and veins (Blood vessels)
These are the pipe-like structures carrying blood to different parts of the body.
Arteries are the vessels that emerge from the heart. In contrast, the veins are vessels which merge into the heart.
Due to this arrangement, arteries carry oxygenated blood away from the heart, whereas the veins bring deoxygenated blood to the heart.
This is a major organ of the digestive system. It has an internal volume of about 1.5 liters in an adult.
It acts as a reserve for food, and here, food is stored temporarily before it passed on to the small intestine.
This storage is necessary to treat the food with hydrochloric acid and other digestive juices.
This is a long pipe like structure that is a part of the gastrointestinal tract. It starts from the stomach and ends with the large intestine.
It has 3 parts like duodenum, jejunum, and ileum. The entire length of this structure is around 5 meters in length. It is involved in the digestion of food and absorption of nutrients.
This is a structure which is in continuation with the small intestine. It is relatively larger and is 1.5 meters in length.
It is also a hollow organ and pipe like which carries the digestive mass from the small intestine to the outside of the body.
It can be divided into different parts as
- ascending colon,
- transverse colon,
- descending colon,
- sigmoid colon,
- rectum and anus.
It is involved in the absorption of excess water, minerals, and vitamins. It houses friendly bacteria that help in the formation of vitamin K and Folic acid.
It temporarily contains the feces before being expelled out of the anus.
This is a sac-like structure attached to the posterior of the liver. It opens into the bile duct.
It acts as a reservoir for bile juice.
This is a hollow structure present at the end of the urinary system. The bladder temporarily holds up the urine until emptied. It can hold urine up to 600ml. It is connected to the kidney through the ureters and opens out through the urethra.
This is a major hollow organ present only in females. It has a dimension of 7.5 cm in length and 5 cm in width with muscular walls.
It accommodates fertilized ova and can grow bigger to accommodate the growing baby.
These are the extensions of the uterus. There are a pair of fallopian tubules in the female reproductive system.
The ova released by ovaries are collected by the infundibulum. Then these ova travel through these tubules towards the uterus.
Other hollow organs
The organ is one that is made up of a group of tissues. However, not all organs have vital functions. Of these less active organs, some are hollow inside like
a) Trachea and bronchi
b) Esophagus, pharynx
f) Bile duct.