What Is The Function Of Each Organ – An organ is a group of tissues that work together for the overall function of the organ, and an organ system is a group of organs that work together to perform a specific function. The human body consists of eleven organ systems. They are the circulatory system, skeletal system, muscular system, nervous system, endocrine system, cardiovascular system, lymphatic system, respiratory system, digestive system, urinary system and reproductive system (female and male).
See figures (PageIndex) and (PageIndex) below to determine the elements and functions of the eleven element systems. Note that some organs perform functions that directly participate in the functioning of more than one system. For example, testes and ovaries both have an endocrine function (produce sex hormones) and a reproductive function (produce cells called gametes that give rise to a new organism). Another example is the pancreas, which has an endocrine function (producing hormones) and a digestive function (producing juices that aid in digestion).
- 1 What Is The Function Of Each Organ
- 1.1 Activity 2. Fill Me In! Objective: Describe The Function Of Each Organ In The Respiratory System. What You
- 1.2 Use Your Text To Label Each Organ Of The Digestive System. (page 227) Color Each Organ A Different Color. (if You Do Not Have Color Pencils, You Will.
What Is The Function Of Each Organ
An organism like humans needs all organ systems to work properly to maintain homeostasis and health. Because all organ systems are ultimately composed of ions and molecules, an understanding of the body’s chemistry and cellular structure, as reviewed in this course, is required for successful mastery of human anatomy and physiology.
Duodenum: Anatomy, Location, And Function
Figure (PageIndex) Organs and Function of the Visceral System, Skeletal System, Muscular System, Nervous System, Endocrine System, Cardiovascular System
Figure (PageIndex) Organs and Functions of the Lymphatic System, Respiratory System, Digestive System, Urinary System, and Female and Male Reproductive Systems The function of the digestive system is to break down the foods you eat, release their nutrients, and absorb them. Nutrients within the body. Although the small intestine is the workhorse of the system, where the majority of digestion occurs, and where most of the released nutrients are absorbed into the blood or lymph, each of the organs of the digestive system makes an important contribution to this process (Figure 23.1.1).
Figure 23.1.1 – Components of the Digestive System: All digestive organs play integral roles in the life-sustaining process of digestion.
As with all body systems, the digestive system does not work in isolation; It works together with other body systems. Consider, for example, the relationship between the digestive and cardiovascular systems. Arteries supply oxygen and processed nutrients to the digestive organs, and veins drain the digestive tract. These portal veins form the hepatic portal system, which does not return blood directly to the heart. Instead, this blood is returned to the liver, where it is loaded with nutrients for processing before the blood returns to the heart. At the same time, the digestive system provides nutrients to the heart muscle and vascular tissue to support their function. The interaction of the digestive and endocrine systems is also important. Hormones secreted by many endocrine glands, including the endocrine cells of the pancreas, stomach, and small intestine, contribute to the regulation of digestion and nutrient metabolism. In turn, the digestive system provides nutrients for endocrine function. Table 23.1 quickly shows how these other systems contribute to the functioning of the digestive system.
Activity 2. Fill Me In! Objective: Describe The Function Of Each Organ In The Respiratory System. What You
Mucus-associated lymphoid tissue and other lymphoid tissues protect against the entry of pathogens; Lactose absorbs lipids; and lymphatic vessels transport lipids to the bloodstream
The easiest way to understand the digestive system is to divide its organs into two main categories. The first group is the organs that make up the alimentary canal. The accessory digestive organs comprise the second group and are important for the breakdown of food and assimilation of its nutrients in the body. The accessory digestive organs, despite their name, are important to the functioning of the digestive system.
Also called the gastrointestinal (GI) tract or gut, the alimentary canal (aliment- = “to feed”) is a one-way tube that is 7.62 meters (25 feet) long and 10.67 meters (35 feet) long during life. When measured after death, smooth muscle loses tone. The main function of the alimentary canal organs is to nourish the body by digesting food and absorbing the released nutrients. This tube starts at the mouth and ends at the anus. Between those two points, the canal adapts to the body’s functional needs, including the throat, esophagus, stomach, and small and large intestines. Both mouth and anus to the external environment; Thus, food and waste in the alimentary canal are technically considered outside the body. It is only through the process of absorption that the nutrients in food enter the “inner space” of the body and nourish it.
Each accessory digestive organ helps in the breakdown of food (Figure 23.1.2). Inside the mouth, the teeth and tongue initiate mechanical digestion, while the salivary glands initiate chemical digestion. Once food enters the small intestine, the gallbladder, liver, and pancreas release secretions such as bile and enzymes that are essential for digestion to continue. Together, these are called accessory organs because they sprout from the lining cells of the developing gut (mucosa) and augment its function; In fact, you cannot live without their vital contribution, and many significant diseases result from their dysfunction. Even after completion of development, they maintain communication with the intestine through tubes.
Dysmotility: Causes, Types, And Treatments
Throughout its length, the alimentary canal is composed of the same four tissue layers; The details of their structural arrangements vary according to their specific functions. Starting from the lumen and moving outward, these layers are the mucosa, submucosa, mucosa, and serosa, which is continuous with the mesentery (see Figure 23.1.2).
Figure 23.1.2 – Layers of Alimentary Canal: The wall of the alimentary canal consists of four basic tissue layers: mucosa, submucosa, muscularis and serosa.
The mucosa is referred to as a mucous membrane because mucus production is a characteristic feature of the intestinal epithelium. The membrane consists of an epithelium in direct contact with ingested food and a lamina propria, a layer of connective tissue similar to the epidermis. Additionally, the mucous membrane has a thin, smooth muscle layer called the muscularis mucosa (not to be confused with the muscle layer described below).
-In the mouth, pharynx, esophagus, and anal canal, the epithelium is primarily nonkeratinized, stratified squamous epithelium. In the stomach and intestine, it is a simple columnar epithelium. Note that the epithelium is in direct contact with the lumen inside the alimentary canal. Interspersed between its epithelial cells are goblet cells, which secrete mucus and fluid into the lumen, and endoendocrine cells, which secrete hormones into the intercellular spaces. Epithelial cells have a very short lifespan, averaging from a couple of days (in the mouth) to a week (in the gut). This rapid renewal process helps preserve the health of the alimentary canal despite wear and tear resulting from constant contact with food.
Use Your Text To Label Each Organ Of The Digestive System. (page 227) Color Each Organ A Different Color. (if You Do Not Have Color Pencils, You Will.
In addition to loose connective tissue, the lamina propria contains numerous blood and lymphatic vessels that carry nutrients absorbed through the alimentary canal to the rest of the body. The lamina propria exerts immune function through the inoculation of lymphocytes, which form the mucosa-associated lymphoid tissue (MALT). These lymphocyte clusters are particularly substantial in the distal ileum, known as Beyer’s patches. When you consider that the alimentary tract is exposed to food-borne bacteria and other foreign substances, it is not difficult to understand why the immune system has developed a mechanism to defend itself against the pathogens encountered within it.
This thin layer of smooth muscle is in a constant state of tension, pulling the lining of the stomach and small intestine into undulating folds. These folds dramatically increase the surface area for digestion and absorption.
As its name suggests, the submucosa lies immediately beneath the mucosa. A broad layer of dense connective tissue that connects the superficial mucosa to the underlying ligaments. This includes dispersal of blood and lymphatic vessels (carrying absorbed nutrients) and submucosal glands that secrete digestive secretions. In addition, it serves as a conduit for a dense branching network of nerves called the submucosal plexus, which functions as described below.
The third layer of the alimentary canal is the muscularis (also called muscularis externa). The intestinal mucosa is composed of two layers of smooth muscle: an inner circular layer and an outer longitudinal layer. Contractions in these layers promote mechanical digestion, exposing food to digestive chemicals and moving food through the canal. In the most proximal and distal parts of the alimentary canal, including the mouth, pharynx, anterior esophagus, and external anal canal, the sphincter is composed of skeletal muscles that provide voluntary control over swallowing and defecation. The basic two-layer structure found in the small intestine is modified in its proximal and distal organs. The stomach is equipped for its secretory function by the addition of a third layer, the oblique muscle. While the colon consists of two layers like the small intestine, its longitudinal layer is divided into three narrow parallel bands, the tenia coli, which appear.
Human Body Systems: Overview, Anatomy, Functions
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