Health Education

SymptomCommon human coronavirusesCommon human coronaviruses, including types 229E, NL63, OC43 and HKU1, generally cause mild to moderate diseases in the upper respiratory tract, such as the common cold. Most people become infected with these viruses at some time in their lives. These diseases usually only last a short time. Symptoms may include. runny noseheadachecoughsore throatfevera general feeling of discomfortHuman coronaviruses ...

·         Fruits consist of dermal, ground (fundamental), and vascular tissue systems ·         The fruit wall is made up three layers collectively forming the pericarp; §  Exocarp §  The outermost layer §  Mesocarp §  The middle layer §  Endocarp §  The inner layer ·         The fruits may also contain one or more seeds       ...

Introduction to Fruits ·         Fruit is the ripened ovary or ovaries of a seed-bearing plant ·         Fruits may contain one or more seeds ·         A fruit develops from one or more carpels ·         After fertilization in the flowering stage, the ovary and sometimes accessory parts develop into the fruit ·         In some species, fruits may be formed without fertilization i.e. ...

·         A typical flower is made up of the following parts;- §  Peduncle –the flower stalk §  Receptacle –bears the floral organs §  Forms the hypanthium if elongated below the calyx §  If below the ovary it is the gynophore or stalk of the ovary §  Calyx –made up of sepals (to protect young flower bud) §  Polysepalous if sepals ...

·         External leaf characteristics (such as shape, margin, hairs, etc.) are important for identifying plant species ·         Leaves are determinant in growth i.e. they grow and achieve a specific pattern and shape, then stop ·         Other plant parts like stems or roots are non-determinant ·         Leaves are classified on the basis of: §  Arrangement on the stem §  Alternate, opposite, ...

·         The leaf is made up of three tissue systems (Dermal, Ground and Vascular) ·         The dermal tissue system consists of lower and upper epidermis ·         The ground tissue system is found between the epidermal layers of leaf ·         Epidermis §  In dicot leaves, the epidermis is dorsiventral §  Generally, the epidermis is made up of a single layer of ...

         Introduction to Plant Leaves ·         A leaf is a plant organ that is found above the ground and is specialized for photosynthesis ·         The leaf is typically flat and thin ·         Functions of the leaf §  Provides for transpiration and guttation §  Storage of food and water ·         The leaf consists of a petiole, a lamina ...

·         Internal structure of monocotyledonous stem consists of: §  Epidermis, §  Hypodermis, §  Ground tissue and §  Vascular bundles      Epidermis §  It is the outermost layer of the stem made up of single layer of parenchymatous cells and covered with a thick cuticle in some plants §  Consists of few stomata ·         Hypodermis §  Is made of few ...