Inside the human being (part 4)

Inside the human being-4

Human alimentary canal-

The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body. The process of digestion has three stages: the cephalic phase, the gastric phase, and the intestinal phase.

The first stage, the cephalic phase of digestion, begins with gastric secretions in response to the sight and smell of food. This stage includes the mechanical breakdown of food by chewing, and the chemical breakdown by digestive enzymes, that takes place in the mouth.

Saliva contains digestive enzymes called amylase, and lingual lipase, secreted by the salivary glands and serous glands on the tongue. The enzymes start to break down the food in the mouth. Chewing, in which the food is mixed with saliva, begins the mechanical process of digestion. This produces a bolus which can be swallowed down the esophagus to enter the stomach.

The second stage of digestion then begins in the stomach with the gastric phase. Here the food is further broken down by mixing with gastric acid until it passes into the duodenum, the first part of the small intestine.

The third stage begins in the duodenum with the intestinal phase, where partially digested food is mixed with a number of enzymes produced by the pancreas. Digestion is helped by the chewing of food carried out by the muscles of mastication, the tongue, and the teeth, and also by the contractions of peristalsis, and segmentation. Gastric acid, and the production of mucus in the stomach, are essential for the continuation of digestion.

Peristalsis is the rhythmic contraction of muscles that begins in the esophagus and continues along the wall of the stomach and the rest of the gastrointestinal tract. This initially results in the production of chyme which when fully broken down in the small intestine is absorbed as chyle into the lymphatic system. Most of the digestion of food takes place in the small intestine. Water and some minerals are reabsorbed back into the blood in the colon of the large intestine. The waste products of digestion (feces) are defecated from the rectum via the anus.

We cover everything about human alimentary canal in detail in our next blogs.

Stay connected with us.

Previous part

Next part

Comments

Most searched things in 2021

We know what have done in previous year 2021.that time we saw such incidents some was great and some was scare. Here I am going to share you what people searched in 2021 at the level of peak. Near me- Covid hospital? Oxygen cylinder? Covid test? Covid vaccine? How to- Make oxygen at home? Increase oxygen level? Download vaccination certificate? What is- Remdesivir? Black fungus? Taliban? Happening in afganistan? Personalities- Neeraj Chopra Raj Kundra Aryan Khan Recipes- Maithi matar malai. Palak. Chicken soup. Modak.(sweet dish) Inoki mushroom. Sports events- Indian premier league. ICC T20 World Cup. Euro Cup. Tokyo Olympic. Copa America.

How to become a doctor

How To Become a Doctor (With 6 Steps You Can Follow) 1. Complete your senior secondary education To receive a quality medical education and become a doctor, you must graduate from secondary school with the required marks in all the subjects. In your secondary level of education, you can select the core science subjects of physics, chemistry, and biology, as they are mandatory for admission into MBBS. Knowledge of these core subjects is essential to qualify for the medical entrance examinations like NEET, AIIMS or JPIMER. In-depth knowledge of these subjects can help you secure the desired rank in the entrance examination and gain admission in the medical school of your preference. 2. Appear for an MBBS entrance exam After you complete your 12th-grade examinations, you can appear for the required entrance exam to secure admission to a medical college. In India, the National Eligibility and Entrance Test (NEET) is the most popular entrance exam, and most medical colleges accept its ...

What is computer?

'computer' stands for- C- common O- oprating M- machine P- purposely U- used for T- technological and E- educational R- research. What is computer? noun- an electronic machine that can store, find and arrange information, calculate amounts and control other machine. Computer- A computer is a digital electronic machine that can be programmed to carry out sequences of arithmetic or logical operations (computation) automatically. Modern computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. A computer system is a "complete" computer that includes the hardware, operating system (main software), and peripheral equipment needed and used for "full" operation. This term may also refer to a group of computers that are linked and function together, such as a computer network or computer cluster. Hardwares- What is computer hardware- computer hardware is the physical components that a comp...

How to use Instagram without installing a application

Many people wants to save there device storage. And we know Instagram consumes more and more storage as we use it. And finally we stuck in problem of device lagging,slow processing,and many more. So this blog is for whom those people are facing these problems. Here I am going to tell you how to use Instagram without installing the application. Just read the entire process and use Instagram without installing. Here's the process of using Instagram online First open web browser And search instagram.com Then choose the official Instagram website. Then click on it and sign in or create a new account and use facebook without installing the application. Advantages of using Facebook online- Save your device storage. Benefit of using Facebook if the main account is disabled or temporary banned Here I am leaving a video for your better understanding watch this and use Instagram without installing the application. Also subscribe my youtube channel

Inside the human being(part 1)

Inside the human being-1 In these series of blog we look the human body organs its functions and how they work in simple language and short blogs. Watch the complete series to know everything about human body. Human brain- The human brain is the central organ of the human nervous system , and with the spinal cord makes up the central nervous system . The brain consists of the cerebrum , the brain stem and the cerebellum . It controls most of the activities of the body , processing, integrating, and coordinating the information it receives from the sense organs , and making decisions as to the instructions sent to the rest of the body. The brain is contained in, and protected by, the skull bones of the head . The cerebrum, the largest part of the human brain, consists of two cerebral hemispheres. Each hemisphere has an inner core composed of white matter, and an outer surface – th...

Inside the human being (part 2)

Inside the human being-2 Human heart- The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system. The heart has four chambers: The right atrium receives blood from the veins and pumps it to the right ventricle. The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen. The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body. The left ventricle’s vigorous contractions create our blood pressure. The coronary arteries run along the surface of the heart and provide oxygen-rich blood to the heart muscle. A web of nerve tissue also runs through the heart, conducting the complex signals that govern contraction and relaxation. Surrounding the heart is a sac ...

Top 5 smart phones under 10,000 in 2022

If you want to buy best smart phone under your budget so read this blog till end. The smart phones ranking is as follows- 1)redmi 9i- 8,799 Redmi 9i Specifications: ✓4GB RAM,64GB and 128GB Storage ✓16.58 cm (6.53) HD+ IPS Display ✓High-performance Helio G25 HyperEngine Game Technology. 2) redmi 9A- 7,999 The Xiaomi Redmi 9A Green is a device with Android, that has a screen with a 1600x720 pixel resolution. The phone contains 32000 MB storage space and has a 2048 MB working memory. The back contains a good-quality camera that allows you to take great pictures. The Xiaomi Redmi 9A Green is compatible with 4G. The phone is also capable of connecting to Bluetooth version 5.0. Manufacturer Xiaomi has released the Xiaomi Redmi 9A in the colour Green. Screen Size: 6.5 inches Release Date: July 2020 Display Resolution: 1920 x 1080. 3) samsung galaxy A50- 8,399 Samsung Galaxy A50 · Released 2019, March 18 · 166g, 7.7mm thickness · Android 9.0, up to Android 11,RAM | 64 GB ROM | Expandable ...

Inside the human being(part 3)

Inside the human being-3 Human lungs- The lungs are the primary organs of the respiratory system in humans and most animals including a few fish, and some snails. In mammals and most other vertebrates, two lungs are located near the backbone on either side of the heart. Their function in the respiratory system is to extract oxygen from the air and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange. Respiration is driven by different muscular systems in different species. Mammals, reptiles and birds use their different muscles to support and foster breathing. In earlier tetrapods, air was driven into the lungs by the pharyngeal muscles via buccal pumping, a mechanism still seen in amphibians. In humans, the main muscle of respiration that drives breathing is the diaphragm. The lungs also provide airflow that makes vocal sounds including human speech possible. Humans have two lungs, a right lung, an...

Inside the human being(part 7)

Inside the human being-7 Human small intestine- The small intestine or small bowel is an organ in the gastrointestinal tract where most of the absorption of nutrients from food takes place. It lies between the stomach and large intestine, and receives bile and pancreatic juice through the pancreatic duct to aid in digestion. The small intestine is about 18 feet (6.5 meters) long and folds many times to fit in the abdomen. Although it is longer than the large intestine, it is called the small intestine because it is narrower in diameter. The small intestine has three distinct regions – the duodenum, jejunum, and ileum. The duodenum, the shortest, is where preparation for absorption through small finger-like protrusions called villi begins.[2] The jejunum is specialized for the absorption through its lining by enterocytes: small nutrient particles which have been previously digested by enzymes in the duodenum. The main function of the ileum is to absorb vitamin B12, bile salts, and...

Inside the human being (part 8)

Inside the human being-8 Human pencreas- The pancreas is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas is a mixed or heterocrine gland, i.e. it has both an endocrine and a digestive exocrine function. 99% of the pancreas is exocrine and 1% is endocrine.As an endocrine gland, it functions mostly to regulate blood sugar levels, secreting the hormones insulin, glucagon, somatostatin, and pancreatic polypeptide. As a part of the digestive system, it functions as an exocrine gland secreting pancreatic juice into the duodenum through the pancreatic duct. This juice contains bicarbonate, which neutralizes acid entering the duodenum from the stomach; and digestive enzymes, which break down carbohydrates, proteins, and fats in food entering the duodenum from the stomach. Inflammation of the pancreas is known as pancreatitis, with common causes including chronic alcohol...

Smart learning

Search This Blog