Unit 2 Lesson 3 Cell Structure and Function

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Unit 2 Lesson 3 Cell Structure and Function Copyright © Houghton Mifflin Harcourt Publishing Company 1

Unit 2 Lesson 3 Cell Structure and Function Florida Benchmark SC.6.L.14.4 Compare and contrast the structure and function of major organelles of plant and animal cells, including cell wall, cell membrane, nucleus, cytoplasm, chloroplasts, mitochondria, and vacuoles. Copyright © Houghton Mifflin Harcourt Publishing Company 2

Being Eu-nique What are the characteristics of eukaryotic cells? Unit 2 Lesson 3 Cell Structure and Function Being Eu-nique What are the characteristics of eukaryotic cells? Eukaryotic cells differ depending on their structure and function. Structure is the arrangement of parts. Function is the activity the parts carry out. All eukaryotic cells have a nucleus and membrane-bound organelles and common structures that protect and support the cell. Copyright © Houghton Mifflin Harcourt Publishing Company 3

What are the characteristics of eukaryotic cells? Unit 2 Lesson 3 Cell Structure and Function What are the characteristics of eukaryotic cells? Cell membranes act as a barrier for cells. They regulate what enters and leaves the cell. Throughout the cytoplasm of eukaryotic cells is a cytoskeleton, or network of protein filaments that gives shape and support to cells. The cytoskeleton helps in cell division and in movement. Copyright © Houghton Mifflin Harcourt Publishing Company 4

What are the characteristics of eukaryotic cells? Unit 2 Lesson 3 Cell Structure and Function What are the characteristics of eukaryotic cells? The nucleus contains the cell’s genetic material or DNA. Instructions for creating proteins are sent through pores in the nuclear membrane by DNA. Copyright © Houghton Mifflin Harcourt Publishing Company 5

Part-iculars What organelles are found in plant and animal cells? Unit 2 Lesson 3 Cell Structure and Function Part-iculars What organelles are found in plant and animal cells? Cellular respiration is the process by which cells get energy by breaking down food. Mitochondrion is an organelle where cellular respiration occurs. Mitochondria have their own DNA and two membranes. Copyright © Houghton Mifflin Harcourt Publishing Company 6

What organelles are found in plant and animal cells? Unit 2 Lesson 3 Cell Structure and Function What organelles are found in plant and animal cells? Ribosomes are organelles that make proteins by putting together chains of amino acids. Ribosomes do not have a membrane. Some ribosomes are free, and others are attached to the endoplasmic reticulum. Copyright © Houghton Mifflin Harcourt Publishing Company 7

What organelles are found in plant and animal cells? Unit 2 Lesson 3 Cell Structure and Function What organelles are found in plant and animal cells? The endoplasmic reticulum, or ER, assists in the production, processing, and transport of proteins and in the production of lipids. Rough ER has ribosomes attached to its membrane. Smooth ER makes lipids and breaks down toxins. Copyright © Houghton Mifflin Harcourt Publishing Company 8

What organelles are found in plant and animal cells? Unit 2 Lesson 3 Cell Structure and Function What organelles are found in plant and animal cells? The Golgi complex packages and distributes materials in a cell. Lipids and proteins from the ER are delivered to the Golgi complex to be modified for different jobs. Vesicles of pinched-off Golgi complex membrane carry products out of the cell or to other parts of the cell. Copyright © Houghton Mifflin Harcourt Publishing Company 9

What organelles are found in plant and animal cells? Unit 2 Lesson 3 Cell Structure and Function What organelles are found in plant and animal cells? Describe the functions of the organelles in the image below. Copyright © Houghton Mifflin Harcourt Publishing Company 10

Now Showing: The Plant Cell Unit 2 Lesson 3 Cell Structure and Function Now Showing: The Plant Cell What additional parts are found in plant cells? In plants, the cell wall is a rigid structure that surrounds the cell membrane, providing support and protection to the cell. Some fungi, archaea, bacteria, and protists also have cell walls. Copyright © Houghton Mifflin Harcourt Publishing Company 11

What additional parts are found in plant cells? Unit 2 Lesson 3 Cell Structure and Function What additional parts are found in plant cells? A vacuole is a fluid-filled vesicle found in the cells of most animals, plants, and fungi. Plant cells have large central vacuoles that store water and help support the cell. Copyright © Houghton Mifflin Harcourt Publishing Company 12

What additional parts are found in plant cells? Unit 2 Lesson 3 Cell Structure and Function What additional parts are found in plant cells? A chloroplast is an organelle where photosynthesis occurs. Photosynthesis is the process in which cells use sunlight, carbon dioxide, and water to make sugar and oxygen. Chloroplasts are green because of green pigment called chlorophyll, which absorbs solar energy. Copyright © Houghton Mifflin Harcourt Publishing Company 13

What additional parts are found in plant cells? Unit 2 Lesson 3 Cell Structure and Function What additional parts are found in plant cells? How does a chloroplast make food for a plant cell? Copyright © Houghton Mifflin Harcourt Publishing Company 14

Introducing: The Animal Cell Unit 2 Lesson 3 Cell Structure and Function Introducing: The Animal Cell What additional part is found in animal cells? Lysosomes are organelles in animal cells that contain digestive enzymes. These enzymes break down worn-out or damaged organelles, waste material, and foreign invaders of the cell. Some of the materials are collected in vacuoles. Copyright © Houghton Mifflin Harcourt Publishing Company 15