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Life Processes Class 10 Notes helps students in preparing the chapter in a better way. Life processes are essential activities required for an organism's optimal well-being and proper functionality. An organism would not be able to exist without these vital life functions. The basic processes of life include organization, metabolism, response, motion, and reproduction.
Life Processes Class 10 Notes NCERT describes in depth the various processes that both plants and animals go through. In this article, you will find the notes on class 10 chapter on Life Processes.
Table of Content
The existence of life on Earth is primarily supported by several processes and functions. To preserve its health and the effective functioning of its organ systems, an organism must maintain some basic physiological processes. These life processes are needed for existence. The main processes performed by an organism are called life processes. There is a connection between these procedures.
These processes include activities like nutrition, respiration, circulation, excretion, and reproduction, which are necessary for the growth, development, and maintenance of the organism's body. No component of the body, from a single cell to an entire body system, functions independently. For the individual's health and to sustain life, all work in harmony with one another. A disturbance in the equilibrium of these processes is represented by illnesses like cancer and death.
Living things perform a few fundamental tasks that are vital to their survival. Some of the important life processes are discussed below:
Nutrition is the process by which organisms obtain and utilize nutrients from their environment to support their growth, development, and energy needs. It involves the intake of food, digestion, absorption of nutrients, and the elimination of waste. All living things need energy and resources in some form.
Some living things use simple food substances like carbon dioxide and water that come from inorganic sources. There are two main types of nutrition: autotrophic nutrition, where organisms produce their own food through photosynthesis or chemosynthesis, and heterotrophic nutrition, where organisms obtain food from other sources. Now, let's see each in detail.
Autotrophic nutrition is the method through which autotrophs absorb elements from the environment and transform them into stored forms of energy. Some plants use sunlight to produce food and are called 'photoautotrophs'. Whereas some bacteria utilises chemicals as their source of energy and are called 'chemoautotrophs'.
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose.
Heterotrophic nutrition is a mode of nutrition where organisms depend on other organisms for their food supply. In this process, organisms cannot synthesize their own organic molecules and rely on consuming organic compounds produced by other living organisms. This type of nutrition includes various forms such as saprophytic, parasitic, and holozoic nutrition. Examples of organisms exhibiting heterotrophic nutrition include animals, fungi, and many bacteria.
Humans exhibit holozoic nutrition, where they ingest complex organic substances and break them down into simpler forms for absorption. The human digestive system consists of organs such as the mouth, esophagus, stomach, small intestine, large intestine, and associated glands like the liver and pancreas. Essential nutrients required by humans include carbohydrates, proteins, fats, vitamins, minerals, and water, obtained from various food sources.
The digestive process involves the following steps:
When an organism uses food to produce energy, the process that takes place is known as respiration. Organisms need a steady supply of oxygen to perform respiration, as well as a way to get rid of the carbon dioxide that is produced during the process. The methods used by diverse organisms to absorb oxygen and release carbon dioxide vary. Diffusion is a method used for this by unicellular and certain other prehistoric animals.
In plants, diffusion is also utilized to exchange gases. In complex animals, the task of exchanging gases is done by the respiratory system. Gills are the fish's breathing apparatus. Fish utilize their gills to inhale oxygen that is dissolved in the water. Aquatic species breathe more swiftly since there is less oxygen available there. Insects use a system of spiracles and tracheae to take in oxygen. Terrestrial animals have lungs, which allow for gas exchange. Humans breathe more slowly than fish because there is ample oxygen available on land.
Also Read:Types and Phases of Respiration
Carbohydrates are oxidized during respiration to provide energy. The mitochondria, where respiration takes place, are where energy is created and stored as ATP (adenosine triphosphate). ATP is stored in mitochondria and released as necessary.
Also Read: Difference Between Aerobic and Anaerobic Respiration
The body's organs, tissues, and cells that assist in moving nutrients, gases, hormones, and waste products throughout the body are together referred to as the transport system or circulatory system.
These are the primary parts of this system:
All body components receive and deliver blood through hollow tubes known as blood arteries. The three primary types of blood vessels are as follows:
Also Read: Diagram of Blood Vessels
The main function of the heart, a muscular organ in our body, is to pump blood through blood veins throughout the body. It is the main pumping organ. There are four chambers in the human heart. Blood is pumped into each of the two ventricles by two higher chambers known as the atria or auricles. Ventricles are the names of the two lowest chambers. Blood that has lost oxygen is pumped from the right ventricle into the pulmonary artery and then into the lungs.
The aorta receives oxygenated blood from the left ventricle and transports it throughout the body. A double membrane known as the pericardium covers the human heart. Three layers make up the heart wall: the epicardium, myocardium, and endocardium. Fine branching blood vessels called capillaries create a network of arteries and veins.
Transportation in plants refers to the movement of water, nutrients, and other substances throughout the plant. The various processes involved are:
Structures involved in the process are:
Mechanisms with helps in transportation are:
👁 diagramshowingxylemphloemplant130894187
Excretion is the process of removing metabolic waste products from the body to maintain internal balance and prevent harmful buildup of toxins.
The human body is a unique mechanism that can perform multiple life processes at the same time, including digestion, respiration, and blood circulation. As a result, our bodies produce numerous waste products in a variety of forms, including carbon dioxide, water, and nitrogenous wastes like urea.
The organs and mechanisms involved in excertion are:
Plants lack waste-removal organs of their own. There are many ways to remove plant excretory products from the plant body. Both respiration and photosynthesis produce waste products that are employed as starting materials in the other process. The stomata of leaves and the lenticels of stems are responsible for removing gaseous wastes, including oxygen, carbon dioxide, and water vapor. The leaves and bark of plants harbor some waste materials.
The wastes are eliminated by the bark and leaf shedding. The body of the plant stores some waste materials as solid objects after they have been rendered harmless. Tannins, rubber, resins, gum, and essential oils are a few examples of these wastes. The eucalyptus, jasmine, and orange tree oils, among other forms of accumulated waste products, as well as gums from acacia, rubber trees, and papaya trees. These chemicals are occasionally discharged into the soil.
Reproduction is the process by which organisms generate offspring, ensuring the continuation of their species.
There are two types of reproduction in plants:
The process of sexual reproduction involves:
The various methods of asexual reproduction are:
Human reproduction can only take place through sexual activity. In this procedure, two parents together create a new person. Gametes (sex cells) from both parents are fused to create offspring. As a result, the freshly developed person will be genetically and physically distinct from their parents. Sexual reproduction can be seen in human reproduction. Sexual dimorphism is the term used to describe the fact that in humans, males and females have different reproductive systems. While girls have two ovaries, males have testes, often known as testicles.
Fertilization is the term used to describe the fusing of sperm and egg (ovum) to create a zygote. A critical phase of human reproduction is fertilization. The zygote is the name for the fertilized egg. Beginning to split into numerous cells, the zygote transforms into an embryo. The embryo enters the uterus and attaches to its walls there. The embryo is inserted during this procedure, which is known as implantation, and eventually grows into a fetus.
One of the several biological processes that are present in almost all living things is digestion. In order for the body to easily absorb the simpler molecules, more complex molecules must first be broken down. For the purpose of digesting, there is a "tube" in higher creatures like humans. Once the food molecules have been reduced to simple molecules, the blood plasma is where the simple molecules are then absorbed.
Another type of digesting, known as phagocytosis, is displayed by numerous organisms, including amoeba. Here, the organism, which is typically a single cell, uses its plasma membrane to absorb food particles, causing an internal component to develop as an outcome. The food fragments are digested and absorbed once within.
Animals with single openings in their digestive canals include hydras. As a result, food is consumed, broken down, and then reabsorbed through the same aperture. The digestive canals of higher animals contain two openings, allowing for continuous feeding.
NCERT Solutions for Class 10 Science Chapter 5 – Life Process |
