MY BIOLOGY LESSONS

Compiled by: Ubioka Joseph   WEEKS 1-2: TISSUES AND SUPPORTING SYSTEMS INTRODUCTION TO THE SKELETON AND SUPPORTING TISSSUES IN ANIMALS                             Time: 40 minutes OBJECTIVES The students should be able to:   I. Define skeleton and identify the types. II. List and explain the forms of skeletons. III. State the biological importance of skeletons. CONTENT Living things need the support of tissues and bones. These will enable them to maintain shape and perform some other functions such as movement and respiration. SKELETON ANDSUPPORTINGSYSTEMS INANIMALS. The skeleton is the bony framework of the body. In fact, the term Skeleton comes from a Greek word meaning “Dried up.” Living bone, however, is not inert material; it is dynamic and adaptable. BIOLOGICAL SIGNIFICANCE 1.      The skeleton and supporting tissues help the animal in going about fending for themselves. 2.      It is a measure of advancement and development as well as evolu

Multiple Choice Questions   Which of the following is not part of axial skeleton? a)     Sternum b)     Mandible c)     Humerus d)     Sacrum e)     Calvarium  2.          All the following are components of appendicular skeleton except a)     Clavicle b)     Femur c)     Pelvic bone d)     Vertebrae e)     Carpal bones 3.       The paraxial mesoderm around the neural tube gives rise to...... a)     Scleretome b)    Somites c)    Ectoderm d)    Dermomyotome e)    Neural crest 4.       The bones of the pelvic and shoulder girdles are from the mesenchymal cells form...... a)    Paraxial mesoderm b)    Lateral plate mesoderm c)    Intermediate mesoderm d)    General mesoderm e)    Neural crest 5.       During chondrogenesis, the mesenchymal cells first differentiate in to...... a)    Osteoblasts b)    Chondrocytes c)    Chondroblasts d)    Chondroclasts e)    None of the above 6.       The organic component of bone matrix is produced by:  a)    Osteoblasts b)    Osteoc