Grade 6 | The Parts of a Cell | Theme 1 - Concept 1 - Lesson 3 | Science скачать в хорошем качестве

Grade 6 | The Parts of a Cell | Theme 1 - Concept 1 - Lesson 3 | Science

شرح ساينس الصف الرابع الابتدائي لغات - الفصل الدراسي الأول شرح ساينس رابعة ابتدائي - ترم أول لينك تحميل الملزمة https://drive.google.com/file/d/1qk1V... لينك تليجرام https://t.me/mrahmedelbashagroup لينك واتس اب https://whatsapp.com/channel/0029Vaed... In This Lesson: Unicellular organisms They are living organisms that their bodies consist of one cell only. Examples: Bacteria. Multicellular organisms • They are living organisms that their bodies consist of many cells. Examples: Humans, plants and animals. Structure of multicellular organisms bodies : Let's see the structure of the human body as an example of multicellular organisms: ❶ Cells The human body contains different shapes of animal cells. Examples: ❷ Tissues Each tissue is often composed of a group of similar cells that do the same function. Examples: ❸ Systems Each system is composed of a group of different organs to do a certain function. Examples: ❹ Organs Each organ is composed of a group of different tissues to perform its own function. Examples: ❺ Whole body The human body is composed of a group of different systems. Although multicellular organisms are made up of many cells that differ in shape and structure, most cells have some common characteristics, where most cells contain The Functions of Cell Parts ❶ Cell membrane It is the outer lining of the cell. Functions: 1. It protects the cell. 2. It controls the substances that can enter or leave the cell through "selective permeability" feature. ❷ Mitochondria They are one of the organelles of the cell. They are known as the "powerhouses" of the cell. Function: They provide the cell with the energy it needs by converting sugar inside the cell into energy through the "cellular respiration". Cellular respiration It is the process that takes place inside the mitochondria, where oxygen is used to obtain the chemical energy stored in food to help the cells make their functions. ❸ Cytoplasm Function: It is the gelatinous liquid (thick liquid) inside the cell in which all other cell parts (nucleus and organelles) float. ❹ Nucleus Function: It controls all the cell activities such as: Formation of proteins. Cell division to form new cells. ❺ Endoplasmic reticulum It is one of the organelles of the cell. Function: It helps in assembling (collecting) and transporting proteins inside the cell to build and repair the cell. ❻ Golgi apparatus It is one of the organelles of the cell. Function: It helps in packing and transporting different materials: between the cells. out of the cell. بالتوفيق مستر احمد الباشا