मराठी

Nutrition in Human Beings

Topics

Chemical Reactions and Equations
Acids, Bases and Salts
- Acids and Bases in Daily Life
- Acids and Bases in the Laboratory
- Acids and Bases React with Metals
- Reaction of Metal Carbonates with Acids
- Acids and Bases Reaction with each other
- Reaction of Metallic Oxides with Acids
- Reaction of a Non-metallic Oxide with Base
- Common Properties of Acids and Bases
- The pH Scale
- Importance of pH in Everyday Life
- Salts > Family of Salts
- Salts > pH of Salts
- Salts > Chemicals from Common Salt
- Salts > Water in Salt Crystals
Metals and Non-metals
Carbon and its Compounds
Life Processes
Control and Co-ordination
- Human Nervous System
- Neuron (Or Nerve Cell)
- Synapse
- Nerves
- Reflex Action
- Reflex Arc
- The Human Brain
- The Spinal Cord
- Mechanism of Muscle Action Under Nervous Control
- Coordination and Response to Stimuli in Plants
- Tropic Movements in Plants
- Phototropism
- Geotropism
- Hydrotropism
- Thigmotropism
- Chemotropism
- Hormonal Regulation in Animals
How do Organisms Reproduce?
Heredity
- DNA Copying and Variation in Reproduction
- Gregor Johann Mendel – Father of Genetics
Light – Reflection and Refraction
- Light and Its Straight-Line Propagation
- Reflection of Light
- Spherical Mirrors
- Image Formation by Spherical Mirrors
- Representation of Images Formed by Spherical Mirrors
- Image Formation by Concave Mirror
- Image Formation by a Convex Mirror
- Sign Convention for Reflection by Spherical Mirrors
- Ray Optics - Mirror Formula
- Refraction of Light
- Refraction through a Rectangular Glass Slab
- The Refractive Index
- Refraction by Spherical Lenses
- Image Formation by Lenses
- Image Formation in Lenses Using Ray Diagrams
- Sign Convention for Spherical Lenses
- Lens Formula
- Power of a Lens
The Human Eye and the Colourful World
- The Human Eye
- Defects of Vision and Their Correction
- Defects of Vision and Their Corrections > Myopia
- Defects of Vision and Their Corrections > Hypermetropia
- Defects of Vision and Their Corrections > Presbyopia
- Refraction of Light Through a Prism
- Dispersion of Light
- Atmosphere Refraction
- Scattering of Light
Electricity
Magnetic Effects of Electric Current
- Magnetic Effect of Electric Current
- Applications of Biot-Savart's Law > Magnetic Field due to a Finite Straight Current-Carrying Wire
- Magnetic Field Due to a Current-Carrying Conductor
- Right-hand Thumb Rule
- Applications of Biot-Savart's Law > Magnetic Field at the Centre of a Circular Loop
- Applications of Ampere’s Circuital Law > Magnetic Field of a Long Straight Solenoid
- Force on a Current Carrying Conductor in a Magnetic Field
- Fleming’s Left Hand Rule
- Magnetism in Medicine
- Domestic Electric Circuits
Our Environment

Definition: Saliva
Definition: Salivary Amylase
Key Points: Nutrition in Human Beings

CBSE: Class 10

Definition: Saliva

A digestive fluid secreted by salivary glands that moistens food and contains the enzyme salivary amylase to break down starch is called saliva.

CBSE: Class 10

Definition: Salivary Amylase

An enzyme in saliva that breaks down starch (a complex carbohydrate) into simple sugars is called salivary amylase.

CBSE: Class 10

Key Points: Nutrition in Human Beings

In humans, nutrition takes place through the alimentary canal, a long tube from mouth to anus, where different parts help in digestion.
In the mouth, food is chewed and mixed with saliva which contains an enzyme (salivary amylase) that starts breaking down starch into sugar.
In the stomach, food is mixed with gastric juices (acid, pepsin, and mucus) that help digest proteins and kill germs.
In the small intestine, food is completely digested with the help of juices from the liver (bile) and pancreas (pancreatic enzymes), and nutrients are absorbed by villi into the blood.
The large intestine absorbs water from the remaining food, and the waste is removed from the body through the anus.