Lesson 9 Multicellular Organisms
Completion requirements
Introduction
How do cells work in a multicellular organism?
AS3.1 The cells of a leaf are used for photosynthesis
Multicellular organisms are made of millions of cells, and each cell is part of a system that helps the organism survive. Since each cell is part of a specific system, they are all specialized. These still perform the basic functions of
life, but they have other jobs as well that benefit the organism as a whole.
In Section 3, we will look at plants as an example of a multicellular organism. We will study the specialized cells and how they work together to create the systems they are part of. We will also take a look at the systems to see how they allow for the survival of the plant.
In Section 3, we will look at plants as an example of a multicellular organism. We will study the specialized cells and how they work together to create the systems they are part of. We will also take a look at the systems to see how they allow for the survival of the plant.
Targets
By the end of this section, you will be able to
AS3.2 Plants are multicellular.
AS3.3 Structure of a leaf
AS3.4 Stomata are used for gas exchange in plants.
AS3.5 Celery with xylem and phloem
AS3.6 Plant growing toward light
- explain why specialized cells are needed in multicellular organisms
- describe how the cells of the leaf system have a variety of specialized structures and functions to support the process of photosynthesis
- explain how plants exchange carbon dioxide for oxygen
- explain how plants move water and nutrients from the roots to the leaves
- explain phototropism and gravitropism and trace the development of theories of phototropism and gravitropism