Our human body has various special ways of responding to antigens. Mostly these ways are classified into two categories: 1  Antibody-mediated immunity in which the different antibodies that are dissolved in lymph, blood and other fluids of the body bond with the antigen and activate a response (humoral immunity).he most important role in immunization is played by white blood cells or lymphocytes which are usually produced in the bone marrow and are then transported to various organs for their protection. Cell mediated immunity is also a part of this whole defense system.
Definition: A square is a quadrilateral with all four angles right angles and all four sides of the same length. So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus every square is a rectangle because it is a quadrilateral with all four angles right angles. However not every rectangle is a square, to be a square its sides must have the same length. Penny.
The number of sides; The interior angles (the angles inside). The length of the sides. These properties help use to remember which shapes are which and why they so called (in some cases). Let us look at shapes that have 4 sides Quadrilaterals (Quad- means 4). Quadrilaterals ALWAYS have 4 sides. The interior angles of a quadrilateral add up to 360 degrees. Here are the quadrilaterals you are expected to know about. Square; Rhombus; Rectangle; Parallelogram; Trapezium; Kite; That does not seem to many does it. Let us look at the properties of quadrilaterals. Square. A square has got 4 sides of equal length and 4 right angles (right angle = 90 degrees).