1. Lab Exercise # 2Zoo- 103

2. Lab Exercise # 2Zoo- 103 The Cells The Tissues The Organ The System The Body Basic structural and functional unit of life Cells group together to form tissues Different tissues combine together to form an organ Different organs combine together to form a system Different systems combine together to form an animal or organism

3. 3 النواة فجوة مركزية بلاستيدة خضراء ثقوب بينية الجدار الخلوى الميتوكندريا الهيكل الخلوى Plant Cell

4. 4 ميتوكوندريا غشاء بلازمى حهاز جولـﭽـى ريبوسوم الهيكل الخلوى جسم مُحلل سوط حركى الشبكة الإندوبلازمية النواة المادة الوراثية نوية الجدار النووى Animal Cell

5. CELL DIVISION AmitosisMitosisMeiosis Amitosis  Direct cell division  It is simple division  It occurs in lower animals such as amoeba

6. Mitosis The term mitosis (mitos= threads, sis= process) It occurs in somatic cells of the body Mother cell gives two daughter cells each one contains diploid number of chromosomes (2n) This type of cell division responsible for growth of the organism and repair of damaged tissues.

7. Mitosis can be divided into stages Prophase Metaphase Anaphase Telophase

8.  Chromosome become visible  Centriole divides in two halves  Nuclear membrane disappears  Each pair of centrioles move to one pole of dividing cell Prophase stage- mitosis cell division

9. Each chromosome divides in two chromatids The chromosomes are align at the equatorial (middle) plate of the cell Spindle fibres attaches the chromosomes at centromere Metaphase stage- mitosis cell division

10.  Halves of the chromosomes go to the opposite poles  Two paws of the chromosomes are formed Anaphase stage- mitosis cell division

11.  Two daughter nuclei are formed  Chromosomes in the nuclei disappeared  Nuclear membrane reappear  Daughter nuclei are identical and copy of their mother cell Telophase stage- mitosis cell division

12. Simple epithelialCompound Epithelial Single layer of cellsmore than one layer of cell

13. . Lab Exercise # 2Zoo- 103 The Connective Tissue Hyaline Cartilage

14. Fibrous connective tissue

15. Lab Exercise # 2Zoo- 103 The Muscular Tissue Striated Muscle Skeletal muscle

16. Lab Exercise # 2Zoo- 103 Nucleus Dendrites The Nervous Tissue Neurons

17. What is blood made up of? An adult human has about 4–6 liters of blood circulating in the body. Blood consists of several types of cells floating around in a fluid called plasma. The red blood cells (RBCs) contain haemoglobin, a protein that binds oxygen. RBCs transport oxygen to, and remove carbon dioxide from the tissues. The white blood cells fight infection. The platelets help the blood to clot, if you get a wound for example.