The Organs at Work.     The body  of man in the generic is mainly composed of trillion cells which are considered as the fundamental unit of life.The group of similar cells with similar functions forms a tissue. These tissues combine together to form organs and form an organ system, ….  Read More

              The Digestive System of Men (In The                             Generic).         Digestive system of Humans The digestive tract of humans starts with the mouth and ends with the anus. It includes different structures such ….  Read More

  The Respiratory System     Topics to be Studied here -Body surface: cutaneous, gills and lungs. -Characteristics of The Respiratory System         Respiratory System What Is the Respiratory System? The respiratory system is the organs and other parts of your body involved in breathing, when you exchange oxygen and carbon dioxide. ….  Read More

    Introduction Air enters the respiratory systems of insects through a series of exterior apertures known as spiracles. These spiracles, which in certain insects serve as muscle valves, lead to the internal breathing system, which is made up of a densely networked array of tubes known as tracheae. Consider the insect respiratory system as ….  Read More

  Respiratory System: Body surface: cutaneous, gills and lungs.                       What is a respiratory System or structure? The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs and blood vessels. The muscles that power your lungs ….  Read More

  Mechanisms of gaseous exchange in Amphibians, Mammals Fish,etc. – In Retrospect the Toad.       Amphibians The living amphibians (frogs, toads, salamanders, and caecilians) depend on aquatic respiration to a degree that varies with species, stage of development, temperature, and season. With the exception of a few frog species that lay eggs on land, all ….  Read More

      Man’s Excretory System   Did you know that in man, the skin is also an excretory organ? That’s right, sweat is actually the waste of our body. Let us study all about man’s excretory system. Parts of man’s Excretory System Every living organism generates waste in its body and has a mechanism to ….  Read More

⊆ Area of Concentration   1. Plant kingdom 2. Organs at work

      Excretion in a Single Celled -Unicellular Aquatic Organism.     Organisms consume food for survival, growth and repair. Most of the food is digested and utilised by the body for the production of energy; the rest is expelled from the body by the digestive system in the form of faeces. This process ….  Read More

  Excretion System -Diffusion by body surface and by contractile vacuole. Diffusion Definition “Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.” Read on to explore what is diffusion and the different types of diffusion. What is Diffusion? Diffusion is the process ….  Read More