What is Bolus in biology?

Asked By: Asbel Joaniquet | Last Updated: 1st July, 2020
Category: medical health digestive disorders
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Bolus, food that has been chewed and mixed in the mouth with saliva. Chewing helps to reduce food particles to a size readily swallowed; saliva adds digestive enzymes, water, and mucus that help chemically to reduce food particles, hydrate them for taste, and lubricate them for easy swallowing.

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Consequently, what is the meaning of bolus in biology?

In digestion, a bolus (from Latin bolus, "ball") is a ball-like mixture of food and saliva that forms in the mouth during the process of chewing (which is largely an adaptation for plant-eating mammals). Under normal circumstances, the bolus is swallowed, and travels down the esophagus to the stomach for digestion.

Similarly, what is a bolus and chyme? 4 min read. The main difference between bolus and chyme is that bolus is the food mashed up inside the mouth, subsequently converted into chyme, whereas chyme is the food digested inside the stomach. Furthermore, the bolus is more alkaline while the chyme is more acidic.

Also to know is, what is a bolus and how is it formed?

The first step in the digestion process is mastication, or chewing, when food is broken down, lubricated with saliva, and formed into a cohesive mass known as the food bolus. Upon swallowing, the bolus moves to the stomach and undergoes further breakdown during gastric digestion.

What does a bolus look like?

A bolus, very broadly, is a mass of a substance that is about to be passed into, or is already inside of, some sort of tube-like structure of the body. This can refer to: Food that has been chewed and formed into a round mass inside the mouth, about to be swallowed. Undigested food passing through the digestive tract.

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What is Bolus used for?

In medicine, a bolus (from Latin bolus, ball) is the administration of a discrete amount of medication, drug, or other compound within a specific time, generally within 1 - 30 minutes, in order to raise its concentration in blood to an effective level.

What is another word for bolus?

Words related to bolus
medicine, tablet, dose, pellet, pill, bullet, lozenge, troche, cap, food, chew, rumen, quid, stone, ball, shot, wad, mass, rock, pebble.

Where is Bolus found?

After the bolus is swallowed, it enters the esophagus where it continues to be warmed and lubricated as it moves toward the stomach. The acidic environment of the stomach and the action of gastric enzymes convert the bolus into chyme, a liquefied mass that is squirted from the stomach into the small intestine.

What is chewed food called?

Chewing or mastication is the process by which food is crushed and ground by teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. After chewing, the food (now called a bolus) is swallowed.

Where is food bolus formed?


A food bolus is formed as food is chewed, lubricated with saliva, mixed with enzymes and formed into a soft cohesive mass. The bolus remains in the oral cavity (mouth) until the process of swallowing begins.

What is the meaning of bolus injection?

A bolus injection is the administration of drug(s) in a bolus. A bolus is a single, large dose of a drug. An intravenous bolus injection is one that is administered intravenously as exemplified above. Chemotherapy is another example. An intramuscular bolus injection is the administration of a drug bolus into a muscle.

How do you make a bolus?

Abstract: The first step in the digestion process is mastication, or chewing, when food is broken down, lubricated with saliva, and formed into a cohesive mass known as the food bolus. Upon swallowing, the bolus moves to the stomach and undergoes further breakdown during gastric digestion.

What does food bolus mean?

GG Food bolus impactions are acute events that, for the most part, are immediately recognized by the patient. Most food bolus impactions resolve without intervention, either by moving forward to the stomach or by the patient regurgitating the ingested contents.

What is the duodenum?

The duodenum is the first and shortest segment of the small intestine. It receives partially digested food (known as chyme) from the stomach and plays a vital role in the chemical digestion of chyme in preparation for absorption in the small intestine.

What are villi?


Intestinal villi (singular: villus) are small, finger-like projections that extend into the lumen of the small intestine. Villi increase the internal surface area of the intestinal walls making available a greater surface area for absorption.

Is bolus formation mechanical or chemical?

In the stomach, food undergoes chemical and mechanical digestion. Here, peristaltic contractions (mechanical digestion) churn the bolus, which mixes with strong digestive juices that the stomach lining cells secrete (chemical digestion).

What happens to food in the stomach?

Once filled with food, the stomach grinds and churns the food to break it down into small particles. It then pushes the small particles of food into the first part of the small intestine, called the duodenum. The small intestine is where most of the digestion and absorption of our food takes place.

What does bolus mean in nursing?

in·tra·ve·nous bo·lus
a relatively large volume of fluid or dose of a drug or test substance given intravenously and rapidly to hasten or magnify a response; in radiology, rapid injection of a large dose of contrast medium to increase opacification of blood vessels.

Where does digestion begin?

Digestion begins in the mouth, well before food reaches the stomach. When we see, smell, taste, or even imagine a tasty meal, our salivary glands in front of the ear, under the tongue, and near the lower jaw begin making saliva (spit).

What is Bolus Class 11?


Mucus in saliva helps in lubricating and adhering the masticated food particles into a bolus. The bolus is then conveyed into the pharynx and then into the oesophagus by the process called deglutition. The bolus further passes down through the oesophagus by successive waves of muscular contractions called peristalsis.

How long does it take for food to move down the esophagus?

Once food has entered the esophagus, it doesn't just drop right into your stomach. Instead, muscles in the walls of the esophagus move in a wavy way to slowly squeeze the food through the esophagus. This takes about 2 or 3 seconds.

Where is the pylorus located in a human?

The pylorus is the furthest part of the stomach that connects to the duodenum. It is divided into two parts, the antrum, which connects to the body of the stomach, and the pyloric canal, which connects to the duodenum.