Multi-cellular organisms have many cells that work together in specific ways, each group performing certain functions. When each group does its part, the organism gets everything that it needs. A Tissue is a large group of cells that all have the same purpose or function. Each kind of cell has unique characteristics such as shape, size, flexibility, color and texture. Nerve cell combined with other nerve cell to make nerve tissue. Muscle cell combined with other muscle cell to make muscle tissue. Bone cell combine with other bone cell to make bone tissue. An Organ is a group of tissues that work together to do a certain job for the body. Some of the human body’s organs include the stomach, lungs, heart, kidneys, brain and liver. Some of a plant’s organs include roots, stems, fruit and leaves. When several different organs join to meet the organism’s needs, they are working together in an organ system. There are several different organ systems constantly working in most multi- cellular organisms. You are probably familiar with some of the human body systems. The respiratory system includes the lungs and all the body parts that allow us to breathe in oxygen and exhale carbon dioxide. The circulatory system includes the heart and all the body parts that help move blood around the body. The blood, in turn, carries nutrients and oxygen to all the cells of the body. The respiratory and circulatory systems work very closely together. The digestive system helps to get nutrients from the food that we eaten and stored energy for future use. The excretory system helps remove waste product that would otherwise harm the body. Each of the body’s systems is necessary for the overall health of the body. As the body’s building blocks, cells join to make tissues. Tissues join to make organs. Organs join to make systems. It’s all arranged to ensure the organism’s survival. Answer the following questions based on the reading passage. Don’t forget to go back to the passage whenever necessary to find or confirm your answers. 1) Which statement supports the fact that bone cells are smaller than bone tissue? 2) What is an organ? Give an example of an organ. 3) Which organ system do you think is the most interesting? Why?
Tissues, Organs, & Systems
Multi-cellular organisms have many cells that work together in specific ways, each group performing certain functions. When each group does its part, the organism gets everything that it needs. A Tissue is a large group of cells that all have the same purpose or function. Each kind of cell has unique characteristics such as shape, size, flexibility, color and texture. Nerve cell combined with other nerve cell to make nerve tissue. Muscle cell combined with other muscle cell to make muscle tissue. Bone cell combine with other bone cell to make bone tissue. An Organ is a group of tissues that work together to do a certain job for the body. Some of the human body’s organs include the stomach, lungs, heart, kidneys, brain
and liver. Some of a plant’s organs include roots, stems, fruit and leaves. When several different organs join to meet the organism’s needs, they are working together in an organ system.
There are several different organ systems constantly working in most multi-
cellular organisms. You are probably familiar with some of the human body systems.
The respiratory system includes the lungs and all the body parts that allow us to breathe in oxygen and exhale carbon dioxide. The circulatory system includes the heart and all the body parts that help move blood around the body. The blood, in turn, carries nutrients and oxygen to all the cells of the body. The respiratory and circulatory systems work very closely together. The
Answer the following questions based on the reading passage. Don’t forget to go back to the passage whenever necessary to find or confirm your answers.
1) Which statement supports the fact that bone cells are smaller than bone tissue?
2) What is an organ? Give an example of an organ.
3) Which organ system do you think is the most interesting? Why?
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